The adrenaline dump. Muscle acidosis. Freaking out and then getting real tired. All of the aforementioned things happened to red shorts in this classic case of grappler Vs. striker. Red shorts comes out like a motivated Penn in the first round and then gasses after some nasty and extremely dangerous grappling on the cement parking lot they've designated as the fighting space (when the fight moves onto grass they decide to stop and move back to the cement, wtf?) Then, purple shorts starts picking away at redshorts' face with some high level Street boxing and one of the best comebacks of the years goes down.
Thanks to James Krause for the heads up.