Watch John Carlson send Game 6 to overtime after Capitals rally from down 3-0

The Pittsburgh Penguins appeared on their way to eliminating the Washington Capitals and reaching the Eastern Conference final on Tuesday night.

Then the high-scoring Capitals struck back, thanks in part to one of hockey’s most controversial rules.

After falling behind 3-0, Capitals defenseman John Carlson scored 13:01 into the third period on a 5-on-3 power play to tie the game and send it to overtime.

The power-play goal came in the middle of a bizarre two-minute stretch where the Pengunis received three – yes, three – consecutive delay of game penalties for sending the puck over the glass in their own end. On the second 5-on-3, Carlson made them pay.

His goal followed a second period power-play goal by T.J. Oshie, and Justin Williams’ goal early in the third that made it 3-2.

The Penguins took a 3-0 lead thanks to a long power-play stretch of their own. Brooks Orpik received a double minor for high sticking in the second period and the Penguins scored twice to make it 3-0 after just 27 minutes played.