Shrink.
Dave pressed the red button and was surprised when the gun made a noise and seemed to emit a strange beam of red at him.
He fell backward and dropped the gun, which clattered to the floor and left him wondering what had happened. He felt his stomach where the gun had blasted him, and felt no wound or burn mark.
He took his coat and shirt off and stood in his bathroom to get a better look. He didn't see anything off. His body was just the same as it was that morning. He scratched at his chin and then crossed his arms.
What WAS that then?
He decided he could think it over while he got something to eat. He put his shirt and coat back on and started to head out to go and get some food from the local department store.
As he walked down to the local department store, he started to feel a weird tingly sensation...