Man tries to shoot grocer for refusing fake $20 bill for $3 watermelon(Photo: Central Records){ }SAN ANTONIO - Officials have a man behind bars after he allegedly tried to pay for a $3 watermelon with a fake $20 bill. And when he tried to shoot the grocer for refusing to accept the bill, his gun jammed.  This all started when Paul Ybarra, 39, and an unidentified suspect parked their SUV at a produce stand on Loop 410 East on the city's South side just before Roosevelt Ave around 9:30 a.m. April 24.Read MoreWhile the other suspect stayed in the SUV, Ybarra reportedly walked up...…Man tries to shoot grocer for refusing fake $20 bill for $3 watermelon(Photo: Central Records){ }SAN ANTONIO - Officials have a man behind bars after he allegedly tried to pay for a $3 watermelon with a fake $20 bill. And when he tried to shoot the grocer for refusing to accept the bill, his gun jammed.  This all started when Paul Ybarra, 39, and an unidentified suspect parked their SUV at a produce stand on Loop 410 East on the city's South side just before Roosevelt Ave around 9:30 a.m. April 24.Read MoreWhile the other suspect stayed in the SUV, Ybarra reportedly walked up...WW…