I work a part-time job in a bar which is popular amongst students and locals, it gets especially busy on race nights and I have trouble keeping up with everything. However, last week I was trying to serve a rather rowdy, obnoxious woman when suddenly a glass was thrown and smashed amongst the crowd, I asked her if she was alright when she turned to me and started raving and ranting about the price of her drink and calling me an idiot ****. I'd been railed on at that point by my supervisor who was equally stressed out. It took me by surprise to the point where I just burst into tears, right then and there, other staff were lovely and asked if I was alright but I had to leave the bar and go out back, then even worse, my manager came down and saw me, told me to take a breather and get back out there. I can't tell if this is a usual occurrence or not but as someone who's never worked behind a bar before I feel completely inadequate compared to everyone else.