[ThatChicken1]

I work in retail and part of my duties on this day were to greet every customer that came in. Specifically had this drilled into my location's staff recently, so I was completely on it.
A guy walked in while I was behind a display opposite of where he was speedwalking past. About 25 feet away, perhaps. Apparently had bad hearing, too. I shouted "Hello!" and he looks around. " How are you doing today?" to give him a chance to focus on the voice. Still can't find me and my arm's stuck in the display I was working on so I couldn't stand up fully. He starts calling out "What's going on? What do you need?" and I try explaining something along the lines of "I'm just saying hello, nothing's wrong, please carry on" and, stumbling over my words, end up getting him completely confused, annoyed, and thinking I was way overdoing my welcome attempts (which he seemed to mistake as yelling for his advice, help, or similar). He grouched on to finish what he came in for and I didn't welcome a single person the rest of the day unless they spoke to me first.
Remember; doing your best is completely useless when you've speech troubles and half-deaf people around!