Hall of Infinite Doors

You instinctively duck the projectile coming at you and it lands behind you with a "CLANG"! You straighten up.

"Wait, that's solid metal!" you exclaim.
"Well ain't you the smart one?" the man replies. "I suppose I'd better grab another!"

You run over to him and grab him by the collar.

"Get off of me then dick!" he snaps.