the level chosen in both videos from the other solutions is the 3rd Area, the level right above the Extra Levels. there are 11 pieces of glass to break, and you have two drink cans and two tennis balls to use. your first throw using the can should hit and break a ceiling glass, then fall and break as many of the little pieces on the floor as possible. next using a ball break one of the first two ceiling pieces on the left. your second can should also hit the ceiling and break any remaining glass on the floor, and your final throw will be another ceiling piece using a ball. you do not have to win the level, just break at least 10 pieces of glass.