Possible Clues:

• Picture with a surprise ending?
• *Sneak into the shot
• Block a shot?
• Post Office, suppressing recent failure, compromised image
• Crash someone’s selfie
• Make a goofy appearance in someone else's picture
• Spoil a shot, in a way
• Pop up in someone's picture
• Join picture at the last minute playing lead that's very popular and nothing to do with stage flop
• Pop up unexpectedly in someone's pic