Saved by the Doobie?
Lopez segued the chat toward Gosselaar's background, saying, "So being Dutch, they're very liberal when it comes to herbal ...
"Yeah, they like to get high," the former Zack Morris said. "When you're in Holland or Amsterdam ... you go to a hash bar, order your coffee and some marijuana ... I think the the last time I was in Amsterdam, I was 18 with my mother and we got high together.
"She'll deny it, but she got f----- up!"
The Saved By The Bell heartthrob said he didn't think it was a significant milestone because he's not a longtime pothead, as it was just something to do.
In turn, Lopez recalled the time he drove his drunken grandparents home from his birthday dinner -- when he was 14!
Gosselaar currently stars on TNT's Franklin and Bash, which airs Wednesdays at 9/8c.