Don't head hop within a scene. When you are rich and famous, do what you want. Until then, it can't hurt to follow a few rules. 
@Colin, I think we’re kind of making the same point just reaching for it from different angles. There are few people here who are ‘average’ readers. Most of us read as writers, it’s unavoidable because it’s who we are. Even the most inexperienced newbie will eventually learn enough about the craft to force them to read differently. I’m not saying it’s a bad thing, I’m just guessing it’s not a true reflection of how the mass market reads.