During the Flyers broadcast for the very same Flyers-Sens game the topic is about, the announcers mentioned that the last time it happened was in December of 08. I forget what the teams were. I didn't think it would be that rare to be honest.
Rangers-Flyers did it maybe 2 years ago... Lundqvist and Nittymaki were both pulled for Valliquette and Biron...
EDIT: link to boxscore.... Lundqvist gone after the first, Nitty gone after giving up a goal to Christian Backman early in the 2nd. http://sports.yahoo.com/nhl/boxscore...gid=2008030213
but one team pulls their goalie for an extra attacker, then gets called on a delayed penalty, so the other teams goalie rushes to the bench. Now you have two extra attackers and no goalies.
That's what I assumed this thread was about, but I've never seen that oddball situation either. Though it'd be pretty funny if it happened. It would only last a few seconds I'd imagine, as the game would either end or the team would touch up.
Alternatively, when a goalie is pulled and an extra attacker is on the ice, can the goalie and the attacker switch at any time? Meaning, if this happens, can the extra attacker immediately skate to the bench and the goalie immediately skate to the crease?