You know what's super important in any sport? Staying hydrated. Our body is made up of mostly water, and the fresh, clear liquid is a must for any athlete that wants to perform at a high level.

But what you shouldn't do is go get that water during the middle of a game, especially when you are a goalkeeper. 

But that's what Mark Flekken of Duisburg did on Saturday. Facing Ingolstadt in Bundesliga 2 action, the goalkeeper decided to turn his back and take a swig. Little did he know that the other team was closing in on goal, and Stefan Kutschke put the ball away with the goalkeeper not paying attention. Take a look:

That is absolutely shocking, and you have to see it to believe it. An all-time blunder and one that will forever be difficult to understand.

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