I'm going to deliberately block a car while crossing the street
Why would you deliberately block a car while you're crossing the street?
I want to annoy the driver of the car.
It sounds like a dangerous prank. It is wrong to block cars when you are crossing the street. You could get yourself killed.
I'm sure they'll see me, it will be fine.
The driver may not see you and hit you with their car which could seriously injure you. You should reconsider trying something that could be quite dangerous.