Listen for a small crash in the garage. Quietly open the door to see your hubby kicking stuff, mumbling things under his breath like "this place is full of crap", "where did all this crap come from" , "I'm gonna throw all this crap away one day"! Then as he looks up and notices you standing there say "hmmm, and who does most of this crap belong to?" Then with a smile quietly close the door.
Really, it is the small things that can give you a giggle!