What can happen is that a sudden undulation in the road surface upsets the Electronic Stability Programme, the driver reacts and the ESP counter-reacts. But that would definitely be felt through the steering wheel and, despite the notorious ESP brake pressure sensor fault, I have not heard of any such problems with VAG cars.

Alternatively it's possible you hit an undulation and a patch of diesel oil at the same time, which chucked you off the road. Diesel spills kill around 100 motorcyclists a year so all drivers should be careful not to over brim diesel tanks when filling up. Finally, it is also possible that tyres were changed and/or suspension realigned without resetting the steering angle sensor. If this is not done it can send false messages to the ESP with potentially disastrous consequences.