Will bullets spark when ricocheting off other objects?

Did the aluminium paint used on Buddy Ebsen, the actor originally slated to play the Tin Man in the 1939 movie version of The Wizard of Oz cause an adverse reaction that hospitalized him?

Is it possible for a medium-to-large build man to break through a wooden door frame on his own power?

Is it possible to be thrown through a glass window and walk away without a scratch?

Is it possible to ignite a pool of gasoline using only a cigarette?

Note: This was a special episode. It was the first appearance of Grant Imahara.