Problem: People are getting in a river holding inflatable rings, then a man jumps and land on a inflatable ring in the water. then

Answer: , people goes down the river on inflatable rings.

Problem: How to heal scars fast
Apply silicone gel sheets.
Silicone gel sheets have been shown to be very effective in healing scars quickly. These can be purchased over-the-counter from a local pharmacy.

Answer: Follow the instructions on the box to apply them to your scar. In most cases, silicone gel sheets should be left on the site of the scar for 12 hours or more.

Problem: How to supercool water
Gather the necessary materials.
For this method, you will need salt, purified water, a small clean glass or plastic cup, a large bowl, and ice. If you have a thermometer it would also be useful, but not necessary.
Answer: Make sure your glass is very clean; any impurities can cause the water to crystallize into ice before supercooling occurs. The bowl must be large enough to contain the glass and enough ice to submerge the glass.