Usain Bolt is freaking fast. Usain Bolt is so freaking fast, so much more so than all those other freaking fast, that he had room to taunt his competitors in a 100 meter dash. We'll repeat that for emphasis: in a 100 meter dash. Despite a victory dance mid-race, Bolt still broke his own world record lowering it from 9.72 sec to 9.69 sec. But what if he had sprinted through the tape? According to an astrophysicist, Bolt would've done something never done before in sport.