Sit down and make sure that your garment is completely unbuttoned. Lay it across your lap with the inside facing up. Let the sleeve that will go on your affected arm hang between your legs. Start working the sleeve onto this arm with the arm that wasn't operated on. Just let your affected arm hang down; don't use it at all. Stand up as you finish using the arm that wasn't operated on to pull the correct sleeve onto the other arm. Carefully work the sleeve all the way up your arm and onto the shoulder. Grab the rest of the shirt with your unaffected arm. Gently throw the shirt behind you, across your back so that the remaining sleeve ends up near the arm it should go on. Reach up toward the sleeve hole with the arm that wasn't operated on. Work your arm up through the sleeve until you push your hand through the hole at the end. Use the arm that wasn't operated on to pull at the garment in whatever areas it isn't correctly fitted to your body. Then, use the hand of this same arm to pull both sides of your garment together in front of you. Button each button one at a time. If you struggle to button your shirt closed, try grabbing the side without the buttons with your pinky and ring fingers. Use your thumb, pointer finger, and middle finger to grab the other side of the shirt and push the buttons through the holes. When you're done wearing your shirt, unbutton it with the fingers of your unaffected arm. Take off the sleeve that your unaffected arm is in with your unaffected arm, and toss the shirt across your back toward the arm that underwent surgery. Then, use your unaffected arm to carefully pull the sleeve down off of the other arm.
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One-sentence summary -- Lay your shirt in your lap and put your affected arm in its sleeve. Use your unaffected arm to work the correct sleeve onto your other arm. Bring the garment across your back with your unaffected arm. Put your unaffected arm in the other sleeve. Adjust the shirt and button it closed. Reverse this sequence to take the garment off.

The vast majority of trunk entrapment cases occur in the victim's own car. The good news is, you can prepare for such an eventuality by installing a trunk release. Check if your car already has a trunk release in the trunk. If it doesn't you may be able to install one as long as yours has an operational electronic trunk release mechanism. If your trunk can be opened remotely, the easiest thing to do is to hide a spare remote in the trunk. Make sure to tell your children and other family members where it is located and how it is operated. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/2\/21\/Escape-From-the-Trunk-of-a-Car-Step-11Bullet1.jpg\/v4-459px-Escape-From-the-Trunk-of-a-Car-Step-11Bullet1.jpg","bigUrl":"\/images\/thumb\/2\/21\/Escape-From-the-Trunk-of-a-Car-Step-11Bullet1.jpg\/aid82229-v4-728px-Escape-From-the-Trunk-of-a-Car-Step-11Bullet1.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class="mw-parser-output"><p>License: <a rel="nofollow" class="external text" href="https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/">Creative Commons<\/a><br>
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<\/p><\/div>"} If your trunk cannot be opened remotely,you can purchase the supplies to install a trunk release yourself for about $4. Have the release installed for you if you are not confident in your mechanical abilities. {"smallUrl":"https:\/\/www.wikihow.com\/images\/thumb\/1\/14\/Escape-From-the-Trunk-of-a-Car-Step-11Bullet2.jpg\/v4-459px-Escape-From-the-Trunk-of-a-Car-Step-11Bullet2.jpg","bigUrl":"\/images\/thumb\/1\/14\/Escape-From-the-Trunk-of-a-Car-Step-11Bullet2.jpg\/aid82229-v4-728px-Escape-From-the-Trunk-of-a-Car-Step-11Bullet2.jpg","smallWidth":460,"smallHeight":306,"bigWidth":"728","bigHeight":"485","licensing":"<div class="mw-parser-output"><p>License: <a rel="nofollow" class="external text" href="https:\/\/creativecommons.org\/licenses\/by-nc-sa\/3.0\/">Creative Commons<\/a><br>
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<\/p><\/div>"} Keep a flashlight, crowbar, and a screwdriver in your trunk. If you can't install a trunk release, keep tools in your trunk that will help you pry open the latch or, at the very least, help you attract attention from passersby.
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One-sentence summary -- Install a trunk release in your car's trunk. Keep several key safety tools in your trunk.

Use a surface like a table, chair seat, or bed. Smooth out the back of your shirt, so there are no wrinkles.
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One-sentence summary --
Find a flat surface and lay out your dress shirt.