There weren’t too many football fans that had heard of Duisburg goalkeeper Mark Flekken before the weekend.

However, everyone was talking about the Dutchman on Saturday afternoon.

That’s because he conceded one of the craziest goals ever during his side’s match against Ingolstadt in the Bundesliga 2.

The footage - which it’s fair to say has gone viral - shows Flekken taking a sip out of his drink bottle as Ingolstadt score past him.

What on earth was going on?

Why did he have his back turned on the ball?

Well, fan footage has emerged which explains the whole thing - and you kind of feel sorry for him.

It shows the home side score a goal, which they celebrate. The PA system even plays music before the referee disallows it.

But with half of the Duisburg side still celebrating - and Flekken walking back to his goal for a celebratory sip of water - Ingolstadt quickly take a free-kick.

The loud PA system is still playing music and the crowd are still celebrating, when one long ball and a poor defensive header hand opposition striker Stefan Kutschke an easy task of tapping the ball into the empty net.

Flekken turned around shocked. He was still unaware that Duisberg’s goal had been disallowed and had a real life glitch as he realised he’d just conceded.

FAN FOOTAGE EXPLAINS WHAT REALLY HAPPENED

Watch the fan footage that explains the behaviour of the poor goalkeeper:

While this goes some way to explain why Flekken wasn’t watching the match, it certainly doesn’t defend his actions completely.

Even if he thought his side had scored, surely he should have still kept one eye on what was happening.

However, maybe the PA system needs to take some of the blame. By playing the music after their disallowed goal, Flekken couldn’t hear the reaction from the crowd that would have told him the goal didn’t stand.

Yet another reason why playing music after a goal has been scored should be banned from stadiums…