Arnold Schwarzenegger is not known for being funny but the Terminator actor decided to photobomb his poorly son, Patrick,recently. 
Arnold took this photo of him photobombing his son post-surgery. 
The actor is seen poking fun at his son's predicament as his son is unconcious. 
Luckly for Arnie, Patrick saw the funny side after he came around, tweeting: "Successful surgery. Praying for fast recovery. Thanks @Schwarzenegger with this photobomb while I was knocked out"