Portland OR. They are probably going through the driver of that truck's personal history and if they can find anything on him, like he voted for president trump, they'll arrest him and the news will have headlines about "white supremacist neo nazi deliberately runs over another peaceful protester! "
"Break a leg" is theatrical lingo for "good luck". It doesn't cover neo bolshevic antifa agitators getting their hip and internal organs trashed by running into traffic.