Anyways, my favorite mockumentary, which is also on my top 10 favorite films is, "What We Do in the Shadows".
A different take from other vampire movies. This movie is about four flatmates who all happen to be vampires living in the modern age. It's kind of like Twilight without the dramatized/cheesy lines, the good looking people, and the ability to walk during the day which still confuses me but funnier and has more relevant conflicts. I definitely recommend this to anyone and am willing to refund the hour and a half worth of time if anyone thinks it was a waste of time.