Its been a very long time that I saw a movie in where Im thinking other dimensional people was fighting it out. Some had like flying chair maybe. Any way the main character some how got to our dimension , but he was like real small here or people here are bigger by a long shot. He had some gun that even though it was like a toy figures gun when he shot at a roach it blasted the table up like some one shot a .22 at the pest. Something to do with a little boy found him . That's all I can remember :-/...