How Good of a Detective are you?

Have you ever fancied yourself quite the sleuth? Well you don't need Sherlock Holmes to tell you that you if you or not, just this quiz. :D

1 There is dust on the cieling and on the wall after the roof came off, where are you doing to search for finger prints?
2 I yell "ow" when I hit my finger with a rock, am I an idiot?
3 A Bycicle was chained, but it was gone in a matter of minutes, how?
4 What is This?
5 50 people are in a room and they all leave one after another, how many people remember everyone leaving?