So he cuts you up by entering an occupied cycle lane at 20 mph, then makes threats? Wow, what a big man. Was it a works van? Why did he stop? I wonder if he knows that leaving the scene of an accident could be very bad for him and/or the company he represents! Glad you're OK. Oh, and please video this individual just in case - it's a public place there's nothing he can do about it (aide from maybe make himself look an even bigger idiot I might imagine). He could have killed you through his stupidity - cyclists, keep an eye - and a video camera - handy ;))
He needs his license removing! His employers need to consider his actions.