Not really classic unless skis and ski boots were all he was wearing.
Heh, heh......if early to mid-70’s is now “classic era”, then that would remind me of the short lived streaking craze.
There was a guy who streaked one of the lectures I had in Todd Auditorium (Todd Aud, as we called it). There was a commotion down at the side of the stage and all of a sudden the ROAR of a decent sized motorcycle. The guy, wearing only a helmet and boots rode the cycle up the aisle, from the bottom stairs, and disappeared out the top doors.
Livened up a fairly stale “ bacteriology “ lecture, I can tell you that. Always figured the guy had helpers at each end of the ride, to make sure the doors were open....
Your comment about the guy car surfing naked brought that motorcycle streaking episode to mind.