I'm sure Haula's butt-end probably hurt Kopitar. But I also think that this is one of several instances these playoffs where players are embellishing the play. Might be wrong, but Kopitar's reaction for the minute after the incident sure felt disingenuous to me.
Can't figure out how to imbed the stills. Here's the TSN video where you can see it.
https://www.tsn.ca/kings-calling-for...nded-1.1058049
0:45 - smacks the right side of Kopitar's face
0:50 - Kopitar holding the left side of his face