Just like any other art mediums, charcoal comes in many varieties. However, each type of charcoal is categorized by whether it is hard or soft. Harder charcoals produce lighter cleaner edges, while softer charcoals are better for blending and making deeper lines. The compressed charcoal stick is a hard charcoal that is great for making darker lines. Compressed charcoal also comes in white to help with highlighting. Soft charcoals are great for blending and creating smudges throughout your piece. However, these are some of the messiest charcoals to work with. Use powdered charcoal for a lighter look and if you are toning larger areas. However, it is generally very messy. When it comes to paper, there is a wide variety to choose from. Choosing the right paper for your piece may take some trial and error. Experiment with a few different paper styles and charcoal hardness to pick what works well for you. Plain white paper, newsprint, bristol board, and illustration board are good choices for a drawing with smooth lines. Plain white paper also creates natural highlights easily because the gray or white of the paper combines with the color of the charcoal. Charcoal paper, pastel papers, and watercolor papers have a fine-ribbed texture that helps create more brittle lines. Toned papers that require you to use both white and black charcoal. Kneaded erasers can completely erase chalk. These, along with blending stumps and white chalk, can also be used to help create shadows and highlights in your drawing. It can be tricky to master drawing with charcoal because any accidental contact you have with your charcoal drawing will cause it to smudge. Start by working at an area where you can keep your drawing vertical and an area that is well-lit. You should always choose a well-lit area since charcoal drawings are on the darker side, it is difficult to see highlighting, shadows, and details of your drawing. "Fixing" your drawing once you're done will keep any dust from the charcoal in place. Fixatives come as a spray that is applied by spraying it onto your work. Fixatives come in 2 types, final and workable. Many artists use the workable spray because you can make small changes to your work after it has been fixed. You cannot alter your work after using the final fixative. You can use hairspray as an alternative, but be careful because it can cause the surface of your drawing to become slightly darker.
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One-sentence summary -- Select a variety of hard and soft charcoal. Choose plain white paper, charcoal paper, or toned paper. Purchase a kneaded eraser, blending stump, and/or white chalk. Work at an easel if you are just starting out. Pick up a fixative to hold the charcoal in place.

If you're hanging upside down, remember gravity is not on your side. Be 100% sure you're secure on the surface you're using. Use your hands to stay in place. You can even have someone else hold your feet to ensure you don't fall. Hanging upside down for prolonged periods can cause issues like dizziness and disorientation. Refrain from hanging upside down for more than five to 10 minutes at a time to avoid this. This should give you plenty of time to pull off the Spiderman kiss. Hanging upside down can be detrimental to your health. Conditions like high blood pressure, heart disease, and glaucoma can be aggravated by hanging upside down. If you have any of these conditions, it's best to try the Spiderman kiss while lying down instead.
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One-sentence summary -- Account for gravity. Do not hang upside down for more than five or ten minutes. Do not hang upside down if you have chronic health conditions.

If you look in between the holes in your tire you can see the rotor, which is the round metal part that your rubber wheel fits over. Many vehicles will have drum brakes on the rear wheels, which have brake shoes rather than brake pads. Find the long metal piece pressing up against the rotor. The large metal piece clamped to the side of the rotor is called the brake caliper. If you look inside of the caliper you should see a rubber lining. This rubber lining is your brake pads. This method is less accurate than taking your wheel off and measuring the brake pads. Make sure your car has been turned off for a while or it may still be hot. Shove a straw in between the caliper and the rotor. Continue pushing the straw until the straw hits the brake disc and comes to a stop. A vernier caliper is a measuring tool that's able to measure in small spaces where a ruler can't reach. Stick the end of the vernier caliper through the hole and read the top of the tool to get a measurement for your brake pads. You can purchase a vernier caliper at a hardware or automotive store or online. Use a marker to make a line where the straw and brake pad meet. Use a ruler or tape measure to measure the space between the end of the straw and your line. This will give you an approximation for how thick your brake pads are. The brake pad backing plate is about 5 millimetres (0.20in)-thick, so you must subtract it from your number to get the accurate width of the brake pads. Your brake pads should be at least 13 inch (8.5mm)-thick after you subtract 5 millimetres (0.20in). if they are under 14 inch (6.4mm)-thick. A new brake pad is usually around 12 inch (13mm)-thick. Once it has worn half-way, you have to replace it soon. Brake pads that are 18 inch (3.2mm)-thick should be immediately replaced and aren't safe to drive on.
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One-sentence summary --
Look in between the spokes and locate the rotor on the front brakes. Find the caliper next to the rotor. Push a straw in between the brake caliper and rotor. Use a vernier caliper to get a more accurate reading. Make a line on the straw with a pen and measure it. Subtract 5 millimetres (0.20in) from the number. Replace your brake pads