What's your worst trip?

Theres no trip that I can call the worst because they all taught me something and had at least something good in them.
The only one I can call not so pleasant is a trip we make with my friend to the neighboring city. The worst part what that I got nauseous on the bus and almost threw up on a seat. I had to go to the in-bus toilet and do the deed there. My mood was already ruined, but when we got there, I started looking for some hotels near me to stay the night and could not find any. I mean, there were hotels, but they all were full because of some sports event that took place that weekend. So, we spent half of the day in the heat looking for a place to stay, which was not cool. But we still had some fun moments there later.