Why is motorstorm pacific rift a 16?

Well, I don't think it should be a 16 either, I think it should be a 12 or something.

I think it's because of some of the rude gestures that Bikes & ATVs can make and when a Bike gets run over by a big vehicle and also because sometimes in the festival some of the racers get out of their car and they're called "dismounted drivers" and if you run them over you're killing them and it makes a loud clicking sound.