For many years, my brother has done PA work on commercials. He recently started doing extra work which pays a little bit better. He never knows for how long he'll appear (usually it's only a split second or so), but he tells us what to watch for just in case.
The first one he was in was the Pepsi/Bob Dylan commercial. You can see him here:
Here's the video if you want to watch it:
The other one was for GoDaddy.com (whatever the hell that is). Here he is again:
Normally I loathe commercials, especially Super Bowl commercials and their accompanying hype, but when you have a family member to look for it makes it a little more tolerable.