One of my housemates, a med student, asked me to do an experiment with her. The experiment was this: to see how long we could hold our arms above our head before they go numb. So we did that. Nothing happened after ten minutes (and besides, we got bored) so we stopped the experiment. I asked her why she wanted to try the experiment. She read somewhere that how long you can hold your arms up indicates how good your heart is. Apparently there are people who can't comb their hair without getting tired arms.
