Watch: Second puck on ice causes mass confusion in Wild-Lightning game

Rossi's shot off the rush clearly went off the glass behind the net and was the puck that both teams continued chasing — except for Rossi, he took the extra puck and deposited it into the net behind a confused Andrei Vasilevskiy.

It did not count. 

Here is a better look at the play.

The second puck was one that had originally been lodged in the protective netting behind the goal and was then jarred loose and fell onto the ice. Rossi gave it a great effort to try to steal a goal there, but there was no way that was ever going to count.