I never really thought I'd share this, but everyone else is jumping in with theirs so why not.
Two years ago, I lived in LA County and a friend and I got bored, so we went to go visit some filming locations from Back To The Future. The houses they used for George McFly, Lorraine Baines, and Biff Tannen are all on the same street in Pasadena, so we went there first.
Biff's house is the last one from where we parked, and when we were walking up, we saw that there was a couple there. We were gonna turn around and go back (didn't want to deal with tourists, ironic I know) but then my friend elbows me and says "oh shit, I think that's Pam from The Office!"
I look and, yeah, it's Jenna Fischer with some tall guy in summer formal wear. Tie, rolled up sleeves, slacks, dress shoes. For some reason I know what Lee Kirk (her husband) looks like, and I knew it wasn't him. They're not making out or holding hands or anything but their body language is definitely affectionate and they're definitely there together.
Anyway, we get up to where they are and my friend tells Jenna that she's a huge fan, blah blah blah, pretty standard celeb interaction. My friend asked me to get a photo of the two of them, and I did, and the tall guy is just sort of in the background looking at the Biff house. We thanked them, checked out the Biff house for a couple minutes, and left.
That night, we sent the photo to one of our friends in Culver City and he texts back saying "holy shit I know that guy in the back!" Apparently they used to intern on some late night show together.
Then he says, "that's funny that he was there at the same time as Jenna Fischer. He works for a company where you can hire him to come to your party and act like Jim from The Office."