Most people that care about this already know about it but it should be posted here anyways.

Pretty much as long as you disarm the bomb in the car, starting R2B a second time causes the mission to pass. Saves the time and worry of going to Pay N Spray and parking the car, allowing you to start Bullion Run right off the bat. Great for 100%, would need a better way to do it for AM than the way I did it in the video.