If your like me and running people through SM for RAF then this trick will help you out while theres enemys in SM.
If theres to many ppl and you cannot get through the door to sm cath/arm then you can just enter library or grave yard, and die, then go and run into the cath/arm to res. this probably is intended as they are all one instance but still a good trick!
also can be used to zerg the enemy by dying in one, then getting behind the door and all comming out at the same time.