Cement trucks: they're big, they have weak brakes, and you should definitely not cut them off on a fast road. Here's proof.
Indeed, if you pull in front of a fast-moving cement truck, like this Peugeot driver did, you're going to get smashed. It looks like everyone got out of the mess okay and everyone learned a valuable lesson about situational awareness.
This Is Why You Don't Cut Off A Cement Truck