I did this same thing once! The driver let me try it, so off I went! However, the foot brake is not so cut-and-dry. There is a specific way to operate it using the top part and not the lower part. When I got to the turn, I could not engage the brakes! I think I took the 90-degree turn on two wheels but managed not to crash.
This guy made a mistake, and he's making it right. Good on him.