If it came from his vehicle (the oil) then the driver has a responsibility to protect other road users from the hazard that it presents.
If his front bumper was lying in the road and Markyboy had hit that whose fault would it have been?
Oil is more of a hazard because it is much more difficult to spot than a large item such as a bumper, but equally as likely to cause damage if it takes you off the bike.
If the driver had been standing infront of the oil directing traffic around it and Markyboy had ignored him and fallen then fine, not the drivers fault.
In this case I'd say that the driver should have taken responsibility for what had happened, and he certainly should not have resorted to physically attacking someone with a legitimate claim for insurance details.
If it came from his vehicle (the oil) then the driver has a responsibility to protect other road users from the hazard that it presents.
If his front bumper was lying in the road and Markyboy had hit that whose fault would it have been?
Oil is more of a hazard because it is much more difficult to spot than a large item such as a bumper, but equally as likely to cause damage if it takes you off the bike.
If the driver had been standing infront of the oil directing traffic around it and Markyboy had ignored him and fallen then fine, not the drivers fault.
In this case I'd say that the driver should have taken responsibility for what had happened, and he certainly should not have resorted to physically attacking someone with a legitimate claim for insurance details.