Grateful Dead drummer Mickey Hart hosted a Q&A session at yesterday’s SF MusicTech Summit, a day-long convention designed to bring musicians and music industry representatives together for a day of proactive discussions about the future of the scene. Hart was thrown off-topic, however, by a tongue-in-cheek Bob Weir who asked, “Mr. Hart, you owe me twenty bucks — am I ever going to see that?”

The two exchange playful banter, before Weir sits down and allows Hart to resume answering questions. Take a look at the clips below:

 

That time when Bob Weir walks in and asks Mickey Hart for his $20. #gratefuldead #sfmusictech

A video posted by Sneffy Robogeisha (@sneffyrobogeisha) on

This gives a whole new meaning to the lyric: “took my twenty dollar bill… it vanished in the air.”