If you take a look at the box score for Monday's game between the Washington Capitals and Buffalo Sabres, you will see a bizarre stat line at 13:33 in the second period.
At that time, John Carlson scored a goal to put Washington up 2-0. At the exact same time, however, Evgeny Kuznetsov was also assessed a penalty for tripping Evan Rodrigues.
A Kuznetsov shot from the blue line hit off the boards and bounced back out to the right of goalie Chad Johnson, sparking a scrum next to the net. Carlson got his stick on the puck for a shot that got past Johnson, but Kyle Okposo kicked the puck off the goal line and out for an incredible save. On the resulting breakout, Kuznetsov was caught tripping Rodrigues and the play was blown dead when the puck was touched up by the Caps.
The Situation Room then initiated a review on Carlson's shot and he was ultimately awarded a goal. Here's a look at the image the NHL sent out after the review:
When a goal is rewarded on review after play is allowed to continue, the clock reverts back to the time the goal was scored, meaning the roughly 14 seconds that happened after Carlson's goal never happened.
Yet, when the goal was assessed, Kuznetsov was still assessed a tripping penalty. Barry Trotz was clearly incredulous with the referee's decision, but ultimately it was the right call.
Rule 78.6 of the NHL rulebook states, "Any penalties signaled during the period of time between the apparent goal and the next stoppage of play shall be assessed in the normal manner."
Had Buffalo scored a goal after Carlson's goal, it would have been called back. Penalties, however, are to be called as normal despite the fact that the extra time after goal technically never happened.
Thus, at 13:33, Carlson was awarded the Caps' second goal while Kuznetsov was given a penalty.