Sadly this isn’t an uncommon thing.
Kinda why I don’t road ride as much as I might like to.
I’ve been going along, minding my own business and bothering nobody.
Then a cars comes along and any manner of things happen.
From coasting up behind me as quietly as possible, to have the front seat passenger lean out and scream at me in some attempt to make me fall off.
To have unidentified fluids thrown over me, fruit and other items thrown at me.
I can only summize that they’re big when they’re in their car and can drive away.
Be a different thing if they had to face me after pulling that shit.
Unfortunately, this type of thing is old news I’m affraid.
I’m sorry yet another person has experienced this type of thing.
I hope no lasting harm has been done and that you didn’t crash, etc.