A freaky video assistant referee (VAR) decision caused mayhem in a Bundesliga game on Monday night when two teams were ordered back on to the pitch at half time because the referee chose to award a penalty after watching a replay on TV.
But while the players were walking back down the tunnel towards the dressing room, the video assistant asked Winkmann to look at the penalty call again.
Mainz fans protest the Monday night contest by throwing toilet paper onto the field.
He ordered both sets of players back onto the pitch so that the penalty could be taken.
De Blasis added a lucky second as his shot rolled over the line after hitting the inside of the post, with Schwolow out of his goal having passed the ball straight to Mainz midfielder Robin Quaison.More news: KKR cruise past Delhi, Maxwell
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There was a further 10-minute delay before the start of the second half as fans threw hundreds of toilet rolls onto the pitch in a protest against Monday evening matches.
Mainz remained the stronger team in the second half, and De Blasis wrapped up victory 11 minutes from time after an embarrassing error from Alexander Schwolow.
Potentially one of the most vital goals in the fight at the bottom, but a new low for VAR.
The problem is not the technology, it is the process.
The VAR system has been used in the Bundesliga this season but not without controversy as it has been at the centre of several disputed decisions.
In this case you've got a couple thousand fans off to the bar and they come back thinking it is 0-0.