You know I actually get what you mean.
In the 2014 NFC Championship, Seattle came back to win the game against Green Bay in what seemed like an impossible way after the game seemed decided against them. A lot of Seahawks fans had actually given up and left and had to hear about the comeback from outside because they weren’t allowed back into the venue.
When they actually won (as I was watching it at home on TV) I had so much adrenaline in me it was like being drunk. So on reflection I can totally understand it. It’s a real thing.