If you loose the net connection this is what will happen on QuakeNET, and possible other networks too.
Error from Server [Your host is trying to (re)connect too fast -- throttled]
You then have to remove the server(s) you have added or this will go on forever.
It would be nice if a delay was added if such a message was catched during connect. Maybe increase it with each faulty connect, 60, 120, 180 seconds and so on.
The raw message from IRC reads:
ERROR :Your host is trying to (re)connect too fast --throttled