He still didn't have to demonstrate it, though. If he had managed to set a tone of seriousness in the room, he would have lost it with that. You can mention how ridiculous someone's statement is, without looking ridiculous yourself. But it makes for a funny gif, so I can see how some of these guys think it's "ether"
And the skipping thing isn't as ridiculous as you might think. Trayvon was supposedly running at some point, so he might have meant that Trayvon was doing skip movements while running, which isn't uncommon. Some people actually do a skip motion when they start to run, before going into a full running motion. He might have just not described it properly.