Wait for 3 hours to be seen
I arrived at the ER at midnight, at which point I was told the wait would be 3 hours. Understood. After being there for 4 hours, I inquired about the additional wait time and was advised that people have waited up to 6 hours to be seen. 6 hours?! At this point I left and went to a different ER and was seen immediately.
If one has to wait beyond 3 hours to be seen, you should not be allowed to refer to yourself as an ER, nor bill as such.