Blob is rolling nearby with his round, amorphous body and notices Gus's altercation.  Being in a rival gang, Blob reacts with juicy hostility.  He thinks for a moment, as he is only capable of thought for 1 second at a time, and decides to see what the biz is.  

Approaching Gus, Blob angrily blabs out "Gaayag tultroia qeqe wichto dwop!" while waving his jar of mayonnaise around.  

He slowly approaches the ice cream truck, pours some mayo on the tires, and starts taking enormous bites out of the rubber.