Dexter.
I really don’t mean to sound creepy…but this part of his job is so damn cool….and fun. If you don’t watch Dexter (which why the fuck don’t you?!) he’s a blood spatter analyst for Miami Metro PD. Here he’s smashing these fake heads with hammers to try and figure out the make of a hammer that killed a victim. I wonder if they can actually figure this stuff out by doing this (bet they can) cause that’s pretty damn cool.