Bob-omb

Bob-ombs are enemies that appear in SM64 and SM64D, they have a counterpart that can open cannons for you in levels called the Bob-omb Buddy.

Behavior
When spotting Mario they will run up to him and follow him around before exploding. Mario can pick up Bomb-omb and throw it to make it explode.

Bob-omb clipping
Probably the more useful glitches seen in speedrunning SM64 is Bomb Clipping, it is where a player must throw a bomb omb and throw it and then pick it up right before it expodes. This is ussually used to clip behind the star behind the Chain Chomp in Bob-omb Battlefeild.