Jämtland made a mini jerk in the third period and looked to poke down Norrköping from the league lead.
Halfway into the final period, the home team expanded and led for a while with twelve points.
But the guests came back, and with 17 seconds left of the match, Brandon Tabb put a three-pointer that took the match to extra time.
The team followed suit, and when Carren Wilson Jr put 100-99 to Jämtland in the closing seconds, it looked decided.
But a foul in the last second of extra time changed everything.
Tim Schüberg set the subsequent penalty throws and thus became a great match hero for Norrköping who won by the smallest possible margin, 101-100.
- We are a tough and hard playing team.
It is a strong win with a lot of character, says Felix Terins, who was noted for 22 points, to SVT Sport.
- Jämtland was the only team we had not won against.
It was an important victory and doing it away from home shows even greater character from us.
The win was Norrköping's ninth straight in the basketball league.