This is from this last Thursday's commute but I back then I wasn't on the forum
I didn't see the first part and initially didn't realise what was going on, so it's a bit descriptive.
On my way back home I was going through a section of the road with some building works. It was quite narrow, so a bit difficult for a car to overtake a cyclist. However, it's not a long stretch so usually it's not a problem. I heard a car coming behind me and it's lights illuminated the area around me (it was sometime after 3am). I went a little bit faster so he wouldn't have to drag behind me too long but I wasn't sprinting. Moments later the light disappeared and I thought "Did he turn at the roundabout exit? Did I pass the roundabout exit? ... Anyway." A few seconds later something hit me on the shoulder and a car sped by me, just after the end of the narrow section. I slowed down and looked back and saw some distance behind me a big paper coffee cup rolling about, with its lid off and contents spilled on the road. I turned back ahead and saw the car quite far ahead, slowing down, about to turn past a building and get out of view. Only then he switched his lights on. I actually needed a moment to realise what had happened was that he switched off his lights so I wouldn't be able to see his number plate, waited for me to get to the wider section, threw a full coffee cup at me while hitting the gas (two people in the car?), sped by with his lights off and only switched them on when he was far enough that I couldn't see his plate. Devious.
My first thought after I realised what had happened - "Really?". Second - "Try to catch up to him?... pointless, can't." Third - "Shouting, waving fingers in the air? Won't give you the pleasure, ******." Fourth - "I ought to actually use the action camera I bought."
I didn't stop but got on the pavement a bit later, just in case he (or she) did a spin round the block and decided to do something worse. Being out of long-range ammo and possible disappointment my by my lack of reaction didn't seem like a good combination.
Definitely the weirdest situation I've had cycling. Not the worst, but it was the first thing that had been intentional.
The drink turned out to be something cold with vanilla, of which I had a little bit on my shoulder. Smelled quite nice actually, too bad it went to waste.