Don't be "that guy"

You know when you're driving down the road, with no one behind you, yet someone finds the need to pull out in front of you so you have to slam on the brakes... that is who "that guy" is, or in my case, "that girl."

I attended a class for pediatric advanced life support (PALS) last week & a few of the people there were not familiar with the area, so I told them where I was planning on going for lunch & about 6 others decided to follow me there. We went to La Rumba's which is a Mexican restaurant that has good cheap food. We sat down and one of the girls automatically started complaining because our waiter didn't speak Spanish (this girl was NOT Mexican or Spanish, but was married to one for many years) & because they didn't have a specific dish she wanted. I have to admit that our drinks took forever to come, and our ordering process was slowed even more by this girl. Even I couldn't tell if she was joking or rude because she would switch back and forth between serious & laughing so quickly. She continued to be completely obnoxious throughout lunch to not only the waiter but everyone else at the table too.
Although the service was not the greatest, I felt so horrible for the abuse the waiter was receiving from this girl that I left him a large tip, and apologized numerous times before we left.

Since I am trying hard not to be judgemental, and to approach each situation with love, I'm walking away from this situation with another lesson of how NOT to be "that guy."