Legally, it's definitely an assault. You had a plausible self-defense justification, but if you had just sprayed a random person for no reason, you would definitely have assaulted them.
The Weight weenie on the road bike had already assaulted me once. He attempted to strike me again. I defended myself from a second attack. His attempt to claim I assaulted him held no water. Ill just have to chalk it up to another basement dwelling unhappy person crying out for more attention. I never saw him again. I'm guessing he figured out that starting a fight and then calling home to mama doesn't always work.
NO ASSAULT Just an angry basement dweller.