funny thing that happened at work tonight

my coworker was on the computer behind the customer service desk and i was standing beside him. he was like "hey look how fast i can type my number in" and i said ok. he typed it really fast but only 1 number showed up, i was like "cool good job" he yelled "FU*K" and a cashier in the front end whipped his head around. there were customers there and everything. i ducked down to hide behind the desk and started cracking up. my cowrker started laughing and had to duck down too. we agreed it was classic and one of the funnier moments at the store. i hope no customers complain about it , cant believe he just yelled the F word across the front end. hahah