An alternative view: driver is trying to reverse out with restricted view. Car on opposite side has stopped, driver thinks its OK to continue when cyclist come out of nowhere. Driver swears at cyclist not intending to have confrontation when cyclist stops and confronts already stressed driver who overreacts in major way.
I want to make clear I'm not making excuses for the driver who is clearly an idiot, but if I was reversing out then I'd hope other road vehicles would act in a considerate fashion. In that situation the driver is, not unreasonably, expecting road vehicles to allow him out, the cyclist did not do so but the driver's reaction is OTT.