Impossible

Things that are impossible for humans to do:

1) lick you elbow 
2) sneeze with your eyes open
3) swallow your tongue
4) roll one finger forward while another rolls backwards
5) inhale through your mouth and exhale through your nose at the same time
6) put your head on your stomach
7) eat 1 tablespoon of cinnamon in under 20 seconds
8) eat 6 saltine crackers in a minute
9) circle your hand one way and your leg the opposite way
10) draw the number six while moving your leg in a clockwise circle