How did the New York Rangers celebrate Mika Zibanejad's INSANE 5-goal game Thursday??
LOCKER ROOM SURPRISE PARTY, BABY!!!
Zibanejad could not miss in NY's game against the Washington Capitals ... netting 5 goals, including the OT winner -- and afterward, his teammates celebrated in pretty cool fashion.
They all hid in the locker room at Madison Square Garden ... and once Zibanejad walked in -- they surprised the hell out of him with a moshpit!!
Watch the clip ... the guys go pretty wild -- even dumping a whole water bottle on the star center's head!