That was quite amusing. Reminds me of a time a friend of mine soaked someone who was on a mobility scooter, drove back past a few times and the amount of water had obviously knackered the scooter as it was sat there for quite some time.
I used to live down the road from where that video was shot.
Neither made me laugh, but the extinguisher one left me wondering if i'd have had the presence of mind to reach in and pull him out of the car for a quick brutal lesson in how to win friends and influence people.
Hehe!!
BUT
anyone who witnessed the splash could have reported him to the ol Bill.
Apparently you could be done for driving without due care and attention.
Not funny then if you get nicked with £60 and points on your licence.
If you are paying due care and attention then you know there is a puddle there, a pedestrian who will be splashed, and if you are able to safely make an avoiding action. Of course, one option is to slow down.
It's annoying when you are walking along the pavement and have to try and time walking past endless puddles with gaps in the traffic only to be caught out by some idiot splashing you deliberately. I think the law relates more directly to this than standing on the kerb waiting to be showered.
If I remember correctly (and there is a good chance I do not in this case) the fine for deliberately splashing pedestrians with puddle water is up to about £2000.