Exploding beer accident

It is a national holiday in Germany tomorrow. There will be no shops open at all. (Apart from garages) I was just stocking up with beer at my local super market. As I was buying the food one of the beer cans exploded and sprayed beer all over the cashier. I don't think it was my fault, but I might have hooked the ring pull a little when I put it in my basket. One advantage of not speaking German is that I would have apologized if this would have happened in the UK. The rest of the people waiting in line thought it was funny. I was the real victim because I may not have enough beer.