Surprise Ending Stroke

You've had a long day and you need to stroke, you want a nice release after such a stressful day.. Right? Of course. I'll help you. You're going to have a hard, fast, intense jerk off session punctuated with a few breaks to keep your pace.. Building and building to a very satisfying orgasm. You need that, don't you? I know what you need. I do have a little surprise at the end.. but don't mind that now. Just jerk to my instructions and get those balls ready to explode.