Saw this last night as well, so just thought I'd point out that Jarnkrok did nothing wrong on that play. He was the lone forward and went to the net, got checked in the back, and still got up and was ahead of the last man back for CGY. Josi made the mistake of trying to go behind the net without possession, not Jarnkrok.
Yeah, I saw it the way you did, for sure. But I interpret that play in a 3-on-3 format as being short of conservative scruples by both players.
Josi went in deep, around, and then back out again (gotta wonder if he's trying too much solo himself, seeing how he had Jarnkrok well positioned in the slot and a slew of time/space to make a move that didn't involve totally resetting in the neutral zone) recharging... On the second entry attempt, Josi gained the ground before passing off to Weber, then as Weber is taking the shot wide, Jarnkrok is getting himself smushed in front/to side of the net and by then Josi probably had every expectation that he'd come out from behind the net with possession again.
With Weber still last man back, I can't fault Josi for going in deep (he's learning that brute force works for him afterall, lol) or for Jarnkrok going to the net (admire the heart). I also can't fault Jarnkrok for getting smushed (I've oft wondered about the legality of smacking a player flat down who hasn't even touched the puck), or Josi for following-up with the expectation of recapturing the puck behind the net. Watch the play in slow mo and it's easy not to fault either guy for a thing; they had Weber as last man back and played their o-game.
Also, to Jarnkrok's credit, he has to run a fine line between conservative play knowing his own limitations (meaning the likelihood of being turned into a useless smush in key situations) and playing with enough liberal in his bones that his tenaciousness and energy can compensate for the lack of physical strength.
That said, it's a 3-on-3 OT format and Jarnkrok knew from both Josi's first breach attempt and from how Josi was circling in deep after his pass off to Web (if not also from a fan viewpoint of the whole Josi dynamic), that there was only gonna be Weber on the back end. Meaning he'd have known his choice to go for retrieving the board rebound rather than circling out to high slot was a chancy gambit. And he took it, fair enough.
Unless he was beaten up on the smushing though, he ought to have been high gearing it back into the defensive play (like Josi, incidentally) to cover up the failed effort. Instead, without possession and knowing Josi was equally in deep, he turned into a danger zone, got smushed, and meandered back to the bench just in time for Ribeiro to take the +/- hit.
Again in slow mo, Jarnkrok gets up quickly (so how could there be a real bruising?), takes two quick strides clearly going straight toward the bench, then stops skating altogether and reverts to gliding altogether at near the ozone hashmarks - never once even looking at the developing play headed toward his own net.
Now if that's because Jarnkrok was simply bushed after a long game, including 4 shifts in the final 4:38 minutes of regulation (so like, 5 shifts in the final 5 minutes of the game) and then being smushed down like a rag doll, I feel for him and mostly fault the coach for his questionable habit of trying to get by as much as possible on 3 lines for the last half of near every game. But to the extent Jarnkrok is supposed to be this really smart guy with a slew of heart on sleeve and didn't appear to suffer any actual bruising from the smack down - well, then I fault the player for his lazy glide back to the bench. Least he should do if he's gonna take the risk (while knowing he's got a dman engaged in the rush) is be prepared to butt beat it back to the bench when it don't work out well.
All in though, I fault the coach. Jarnkrok is being put in well over his head and it's showing up in every stat category as well as in his in-game decisions. One quickie small fix would be to merely play the 3rd line like it existed instead - it would spread the ice time around, sure, but it'd also serve to save the energy. Jarnkrok just shouldn't be playing 5 shifts in 5 minutes of game time. He's actually not
that good.