Oh, dear me. When a fully-triggered leftist decides to kick a can of teargas back at the police during a riot, you can be fairly certain it's not going to end well for him. He's basically begging the police to fire back, so he can claim some sort of politically correct victim status.
Sometimes, the cops refrain from offering a response. Other times, they do not. Last night in Phoenix, their 'witty rejoinder' came in the form of a "pepper-ball" - an anti-riot weapon that hits hard, breaks open, and disperses a cloud of eye-and-lung-irritating capsaicin powder.