BMW has recently developed an affinity for sideways action in their promo videos, as seen with their M4 Initiation clip, and now this one for the BMW M5 30 Jahre Edition. That is probably because drifting is the only easiest way of conveying a car is both powerful and handles well.
Those are the qualities you need to get a car sliding, and if the car in question is a big family sedan, it means that it has those qualities in spades. BMW M5 30 Jahre Edition certainly does, as it is the most powerful car the Bavarian company currently makes.
A lot of people gasp when they hear about the next M5 is going to have 625 horsepower. They forget that the existing BMW M5 30 Jahre Edition already has 600! It comes with the Competition Package which enables the car to go from 0 to 100 km/h (62 mph) in 3.9 seconds, and on to a top speed of 300 km/h (186 mph).