Due to Unintentional glitches cannon are capable of launching Bombs and other ammunition through its indirect force by taking advantage of the fact that bombs only explode on Contact. these are the examples of how it looks like. The bomb has to be attached to a grabber so it doesn't fall off and must be released from grabber before the launching. The launcher can be either the Cannon or Shrapnel Cannon. It is best to have the cannon and grabber configured to fire and release on the same key to prevent accidents.
The cannon is placed close to the bomb like shown on the picture
The Shrapnel version of the cannon, note that the shrapnel is not very accurate but stronger.