There were some very scary moments Thursday night at London Ice Park or as most Londoners still call it, Brookside Arena

Two men’s teams were playing pickup when some of them started feeling sick 90 minutes into the game.

One was so sick that his teammates found him lying on his back on the dressing room floor struggling to breath.

EMS was called and the man was rushed off to hospital and about a dozen in total were treated.

London firefighters evacuated the building and found elevated levels of carbon monoxide.

The exact source has yet to be identified.

via News/Talk 1290 CJBK London