That's exactly I was thinking but this was something I'd never seen or even heard about and was wondering if this came under some sort of timing play based on how things went down. Batter must have been deaf because I'm sure everybody and his brother were probably screaming "RUN". Can imagine the problem the batter had if PU initally ruled the pitch a ball and then BU overturned on appeal. Ouch...the kid is between a rock and hardplace.
Pretty alert play by the catcher...covered his butt on not blocking the wild pitch pretty well.