In class, sitting here browsing funnyjunk. Have some work tabs open, so that when he walks behind me, he won't notice I'm not paying attention. Get pretty good at switching tabs fast.
30 minutes have passed, and I'm still here. He walks behind me, and to my surprise, he stops when he sees my screen. Apparently, I switched to the gay furry thread I had opened 10 minutes earlier, because it replaced my work tab.
Thanks guys, the teacher thinks I'm a ******* creep now.