crash on the straight way

so i was driving along the road in front of PISA... wondering where and what to eat.... approaching 70km/h.. on the middle lane...(it's a 3 lane road) and about 50m ahead is a motor bike cruising around that speed also.. and then suddenly.... his tail straights to swing and crash in the middle of the road. i was like WTF!@!@!@!@! slam on my break and signal to the right and change lane.. slowly pass that guy.. he hopped up with his hands on his hips also wondering what happen LOL.... uhh that's gonna hurt real bad when the adrenaline wears out....