Changing a lightbulb
It’s not often that people sound grateful for being mugged, usually, you’re angry, or sad, or injured. This guy sounds like he doesn’t actually mind that it happened, as it was part of a chain of events that led to a move, a new job, getting married, and having kids.
He credits the whole domino of decisions with deciding to change a lightbulb in his refrigerator, and it sounds as if he believes that, if he hadn’t done it, his life would have been completely different. I guess we all need to go and check our refrigerator lights now.