You've all experienced it. It's what keeps you coming back to Arrow in the Head on a daily basis so you're never left out of the loop. It's the reason you keep the Facebook and Twitter alerts on your cell phone always 'on'. It's the hidden curse that we all distress about. Yes, I'm talking about the "Fear of Missing Out" (FoMO). And yes, it is a real concept/disorder. Now those crazy cats over at College Humor have decided to tap into that fear (with a large dose of laughs) with their faux horror trailer FEAR OF MISSING OUT, starring "True Blood" alum Anna Camp. After all, there's nothing scarier than spending your evenings alone…