Things I've used in pitched battles with Brian

A bag of nuts

Two double mattress size inflatable beds, inflated (Totally forgotten this (or blanked out) until now. We emerged from the basement, red faced and panting)

About three dozen bananas

Some rancid strawberries

Grapes

Plain water, bottled

Coffee dregs

Some kind of rubber ball (not sure if this counts. He once launched it towards me just as I was welcoming my girl friend into the office. She doesn't like Brian much)

Half a baguette, ham.

Slice of toast, taped to the underside of this desk

Some of these

A couple of these. Note: Firing these repeatedly against the ceiling where your office is not on the top floor is not recommended.