Even if he grabbed his ear, dropped to the ground with bleeding ear facing the ground, keeping his collar and jacket above the puddle, it would be hard to stay clean with 5 agents dog piling on top of you. I trust the agents would have given him handi-wipes to clean off his hand and face but there was no rag/bandage/towel held up to his ear when he high fisted the crowd.

I've been in a number of fights where my eyebrow was split open, there were not just drips and puddles on the ground but streaming down my face, shirt and collar.

I will account for divine intervention but short of that I would have been a bloody mess if someone even nicked my ear with an exacto-knife