NCAA rule 3-4-3 Unfair clock tactics.
I don't know the exact time left on the playclock, so if ARK would have gotten a few extra seconds of the gameclock by haveing PC reset to 25 and GC started on RFP, I don't know, but there are several other advantages to haveing the GC stopped and then restarted with another 25 sec PC.
Nor am I saying that ARK player faked an injury in this instance (but he did jog of easily) but there are unfortunatly teams fakeing injuries to either consume or conserve time in games like this.
My POV, the R did a very good job in stopping the clock quickly for an injury timeout, and if he did view this as an attempt to consume time, he did the right thing useing R 3-4-3 and starting GC on the snap.