Mario escape is stupid, but hard all at the same time. Its actually a difficult map unless you know exactly what you are doing.
It takes awhile to set up. gotta get a tire or two in there, than the engine. put the engine crossways and with the tires its almost impossible to push the engine back. Plus they get stuck in the engine as well. I've gotten a good amount of kills from the spot, but the fail tubes are so much more fun.
Idk if this has already been said, but on the zombie escape map Helms Deep, when everyone was spawning at the beginning of each round, everyone kept getting connection problems. It was really annoying, I'm really inclined to say it was the map or server as it only happened while everyone was spawning.