Actually, to be fair, i'm not exactly sure. I thought they should be somewhat similar to english people, and the fact that you have a larger body-build than Tom, made me think you were the one drinking more beer (and everyone knows english people love beer
PS: i'm fully aware that my rationalization makes no sense, but oh well...
PS2: next time, please include a voice sample of the people on the photo saying the same phrase, maybe we'll get there by the accent
(actually, given the fact that Tom has been living in germany for a few years, probably that wouldn't help much either