Once you see what's happening in the background, you'll forget all about that (boring) guy in the foreground.
#3 He must have promised her the moon during his proposal.
#4 Meanwhile, at the club . . .
#5 Where's Waldo?
On this occasion Waldo is in Japan, up to no good, leering at bikini beach babes.
#7 This is really one for the books!
Is it possible that photobombers have existed since the invention of cameras? Maybe. Here's a retro Seinfeld photobomb from the 90's: