Sharks go poof!!!,at least for one night...

what happened to the San Jose Sharks,Tuesday night??? they had a 3-1 lead,on the Chicago Blackhawks,with 9:13,left,in the first period,at home,and then lost lead,in fifty seconds,and did not score for the rest of the game,and lost,5-3,to the Blackhawks... i wonder:have the Sharks lost their bite???