This is so scary purely because it happens so fast. The truck's tyre blows out and immediately it veers across the traffic and into the central reservation. If nothing else it's a reminder to not let your mind wander on the motorway and to concentrate at all times.
It also demonstrates why European motorways have concrete barriers whilst us Brits have to make do with puny Armco. This truck would have plunged straight through Armco and into the oncoming traffic.