Ron Howard talked about a recent visit by George Lucas to the set of Solo: A Star Wars Story Thursday on Late Show with Stephen Colbert.

“Everybody’s jaws drop, it’s like snapping to attention,” Howard told Colbert of his and the crew’s reaction when Lucas appeared, and said he was ready to listen when Lucas had a suggestion.

“We were doing a scene and he was trying to stay out of the way, but he did lean over and he said, ‘You know what Han would really do there?’” Howard told Colbert. “I said, ‘What?’ And he told me the joke, he gave me a little joke. And I said [to the crew], ‘Hey, guess what? Here’s what we’re gonna do in the next take.’ So I know when I hear a good idea.” (Not known is the change-up slipped into the final cut).

Howard said Lucas’ visit “was an incredible show of support and respect and it meant the world to me that he would go out of his way to show up,” noting that the architect of the Star Wars universe, “doesn’t spend time around these movies” anymore since he sold Lucasfilm to Disney.

Howard, of course, took over Solo after original directors Phil Lord and Christopher Miller exited over creative differences just weeks before filming was to wrap. “It was an unusual circumstance,” Howard said. “No movie, no set of creative people want to be a part of something like that. It was absolutely creative differences in this particular case.”

Howard’s visit to Colbert was capped off with Colbert introducing a new Solo: A Star Wars trailer for Star Wars Day May 4, in which Howard himself appears.

You can see it all in the clip above.