Spectacular Tricks to Teach Your Body 



10.) Need to breathe underwater for a while? Instead of taking a huge breath, HYPERVENTILATE before you go under, by taking a bunch of short breaths. That'll trick your brain into thinking it has more oxygen, and buy you about 10 extra seconds.
11.) You can prevent BRAIN FREEZE by pressing your tongue flat against the roof of your mouth, covering as much surface area as possible. Brain freeze happens because the nerves in the roof of your mouth getextremely cold, so your brain thinks your whole body is cold. It compensates by overheating which causes your head to hurt. By warming up the roof of your mouth, you'll chill your brain and feel better.
12.) If your hand falls asleep, rock your head from side to side. That will wake your hand or arm up in less than a minute. Your hand falls asleep because of the nerves in your neck compressing so loosening your neck is the cure. If your foot falls asleep, that's governed by nerves lower in the body, so you need to stand up and walk around.
13.) Finally, this one's totally USELESS, but a nice trick. Have someone stick their arm out to the side, straight, palm down. Press down on his wrist with two fingers. He'll resist, and his arm will stay horizontal. Then, have him put his foot on a surface that's half an inch off the ground, like a stack of magazines, and do the trick again. Because his spine position is thrown off, his arm will fall right to his side, no matter how much he tries to resist.
14.) Got the hiccups? Press thumb and second finger over your eyebrows until the hiccups are over - usually shortly.