Mark Frauenfelder at 9:37 am Fri, Feb 21, 2014
ADVERTISE AT BOING BOING!
Prankster Jack Vale reads the nametags of passersby at 2014 NAMM, then says their name on a fake phonecall so they can hear him.
See also: Zombie Phone Prank and Wife on a Leash Prank. (Via Laughing Squid)