When I try to connect to SMP on play.skycade.net it kicks me and says it's a [proxy] or java.ioIOException

I teleported to a player in the game who said there was something cool. I immediately crashed out of the game.

Each time I try to reconnect to SMP, and only SMP, it doesn't work. I get a "[proxy] closed connection" error message or (the more frequent) "Internal Exception: java.io.IOException: An existing connection was forcibly closed by the remote host."

I'm not very good with technical things, but is there a chance that the player I teleported to caused this?? I would love some simplified help.