no bracha on the train

I was sitting on the train last Thursday night on my way back from Tel Aviv. Across from me was a couple of seemingly non-religious soldiers, a boy and a girl (the girl had a gun and the boy didn't), who appeared to have some sort of relationship (they weren't, חס ושלום, making out but they weren't not making out either, if you know what I mean. Let's just say they weren't exactly shomer negia). I say seemingly non-religious because it is hard to tell what level of religious people are just by the way they dress or act. I think I'll call them potentially religious people. The boy takes a drink of water from his bottle and passes it to the girl. The girl picks up the bottle and is about to put it to her lips when the boy says to her, "say a bracha." She starts laughing like it's a big joke and starts to put the bottle to her lips. The guy grabs the bottle and says, "I'm serious, say a bracha." The girl looks at him with a "you've got to be kidding" glance. Then she says to him, "I'm not saying a bracha." And she drinks the water.
The guy says to her, "I can't believe you just drank that water without saying a bracha." She says back to him "shut up" and that was the end of the bracha conversation.

Obviously there may have been some background to this story, but I found the part I witnessed to be a very funny conversation and thought I would share it with you.