England were heading for a first qualifying defeat since October 2009 after Leigh Griffiths struck two glorious late free-kicks to wipe out substitute Alex Oxlade-Chamberlain's 70th-minute opener.
And the former Celtic boss was clearly frustrated as he flung a bottle during an X-rated tantrum.
"It looked like we were going to win the game and then like we were going to lose when 2-1 down in stoppage time". It's special. It could be a big point for us. That's what we have got to show - we have to be a team that are never beaten.
"You can get moments in football, like today, where someone produces unbelievable quality and you find yourself level or behind in a game with the momentum against you and all of the crowd on a huge high".More news: Islamists kill 13 Philippine marines in wartorn Marawi city
Urged on by the Hampden Park faithful, Scotland started on the front foot, Griffiths sending a shot down Joe Hart's throat in the early stages. I've shared the leadership around and that has been important for us as a team. "They keep coming back at you", he said.
"Whatever anybody thinks about us as a group of players, one thing you can't question is their personality, character and commitment".
"The end for me is a significant moment because the character of the team has to come through in these moments", said England manager Gareth Southgate, whose side face France in a friendly in Paris on Tuesday.More news: Thiem stuns Djokovic to reach semi-finals
"I was looking to do the exact same with the second free-kick".
England remain top of their qualifying pool, but Slovenia have trimmed their advantage to three points and Slovakia could cut it down to two if they win in Lithuania later in the day.
"We got ourselves into decent positions and didn't quite finish but the objective's to qualify and we still sit top of the group".
"You try to protect yourself from the excitement but when we equalised I didn't, because that could have been my best result as a manger".More news: Southwest Airlines 72-hour sale offers round trips for under $100