Him using the anvils reminds me of the shoe trick in that cube movie, wher they toss one of their shoes into the room to see if its safe or not, and trigger the trap if it wasn't XD
6:14 oohhhhhhhh i know 11:08 is the top left one a button that adds one the top right one sets it to zero and the bottom button is a confirm button. 11:13 is guessed right i guess probably