Tim Hortons review: employee threatening another employee horribly

Was just in the drive thru at tim horton's (370 wilson st e, ancaster, on l9g 4s4) while pulling up to the window I heard the girl (africa america with purple in her breads) say to another employee (tall guy with red hair) "are your arms broken?".. i'm unsure of what he said to make her say that but i'm guessing he asked her to do something for him.. poor kid looked so embarrassed as I was looking at him (ready to pay) another employee looking at them and then looking at me (probably embarrassed for him)
That girl needs to talk to her coworkers with respect.. I am discussed.