A trick often displayed via an image to get the reader to first hyperventilate themselves and then blow on their thumb, causing oxygen deprivation. The result? A euphoric feeling, however it is not without its consequences, it will of course damage you and, with that euphoric feeling, is an extreme pain, both feelings do not last long.
"Hey dude check this trick out!"
"1) Bring knees to chest
2) Breath deeply in and out for 20 seconds
3) Blow on thumb as hard as possible"
"Lets try it!"
"OH GOD! BRAIN ORGASM!"