This glitch in Super Mario 64 makes a normal-sized Bob-omb turn big. This best works at Bob-omb Battlefield. First, go to the Bob-omb closest to the Chain Chomp (the one next to the white wall). Next, grab it, get a running start, and throw it at the wall. While still running, and right as the Bob-omb lands, dive at it. This may take a few tries. If done right, the Bob-omb should be larger than normal.
Why it works Edit
Bob-ombs can be picked up at any time during their animation, even when exploding. Your diving and throwing makes you throw it and immediately catch it, so the Bob-omb's "hold timer" resets, but it is at the point in its animation where it is bigger than normal.