At least he is aware of the bus passing him 16:48. TOO CLOSE to him? Overtaking him on the LEFT of him BEFORE the parking area? In Japan that is ILLEGAL. 16:48 The bus driver was negligent. In the wrong. He did NOT overtake the bus, the bus moved past him on the LEFT of him; WRONG! That I think caused the guy on the bike to be surprised but also NOT reacting correctly. Wrong gear? Braking, wrong clutch control. He would have just cause to seek redress from that bus driver for damages re him dropping his bike. HOWEVER I get the distinct impression that the motorcycle guy is TIRED. That will affect his cognitive reasoning. Mental and physical state.