It's fine to have a singalong with your friends or family while riding in a car. But when you're so invested in the performance and thinking about what the people on the Internet will think of you once it goes viral, you might lose track of the road. That's more likely the worst case scenario but it still means that it can happen.

These friends learnt it the hard way.

Source - Marco Ferro

Luckily, they're all okay. But that was a close one.