How to make a bomb in Phun. This video will demonstrate the basics of making a bomb in the Phun program. Phun can be very demanding of your computer's resources so if you go a little bit overboard, don't be surprised if your computer crashes or freezes, or does something unusual. The basic concept here, is to use the circles as designated, and copy and paste exactly on top of each other. The more you do this the bigger the explosion. It also uses basic directional physics so you can incorporate other structures and yes, people into the hand made scenarios.