Luka Doncic's epic game-winning triple sent the entire Mavs home crowd to their feet on Saturday as Dallas defeated the Boston Celtics, 107-104. Unfortunately for him, one particular Boston fan was in attendance and his epic reaction to Luka's game-winner was pure heartbreak.

A now-viral clip taken from inside the Mavs' American Airlines Center shows how the entire stadium went bonkers right after Doncic's buzzer-beater. This was except for a Celtics fan in the stands that looked like his entire life had just flashed right before his eyes:

Anyone who sees this clip will likely find it to be totally funny. However, for Celtics fans, this young supporter's reaction pretty much serves as an embodiment of how the entire Celtics nation feels about Luka's game-winner for the Mavs.

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The clip even zooms in on the fan and we can all see how much pain he's in. Although, that Celtics fan is probably thinking that if there was any shot worthy of beating his team, it would have been that shot. Then again, maybe not.

Jayson Tatum's 32-point effort for a shorthanded Boston side was all for nothing, as Doncic put forth another epic performance for the Mavs. Luka's game-winner was just three out of his 33 points on the evening on 12-of-21 shots and 5-of-10 from distance. His buzzer-beater was so epic that even Luka himself was at a loss for words after the win.