So, as you might know, people tend to go to the bathroom during sports game halftimes. When it's a really popular event, like the World Cup, that means whole countries visiting the restroom at the same time. Here's a chart that proves it.
Berliner Wasserbetriebe, the Berlin metro-area water utility, charted water consumption patterns during the Germany-Ghana World Cup match on June 21st. Water consumption fell dramatically during the game, spiking both at halftime and right when it ended:
There you have it, folks. Scientific proof that people use the bathroom and take water breaks during World Cup halftime.