Every time little Ben Solo puts his hands somewhere he shouldn’t, Luke trolls him with a “that’s how I lost my hand” story.
“Ben, get your hand out of that cookie jar, that’s the one that ate my hand.”
“Ben, don’t pick your nose, I lost my hand doing that.”
and they get more and more ridiculous, like
“Ben, don’t play in the laundry pile.” *looks off into the distance* “I made that mistake once…”
Ben doesn’t know what actually happened to Uncle Luke’s hand until he’s like eight.
Ben: “Mom, what really happened to Uncle Luke’s hand?”
Leia: “He still won’t tell you? Darth Vader cut it off.”
Narrator: “And in that moment, Ben felt a sudden affinity and connection to Darth Vader that no one could break.”