The officer probably made a good judgement call by leaving and not causing an accident involving himself or anyone else during this incident.According to thefreethoughtproject.com

Helmet cam footage of a “stunt biker” was posted to YouTube Tuesday which shows a biker tell a CHP officer to “shoo away.” After a brief exchange of words, “you’re not wanted, ”and a few hand gestures, the CHP officer actually leaves. This video was taken on I-680 in Milpitas according to the California Highway Patrol. The officer was trying to pull over the lead biker for “pulling a wheelie.” According to Ross Lee of the CHP, “the officer had been behind these bikes, and trying to make a stop. The riders, as he would get behind one, would move back into a pack and so he was unable to get one of the riders he was attempting to pull over to the shoulder.”