Let's just say that of all the times I have been underneath a vehicle, I have never moved so fast from underneath one that was NOT on stands!
I said a few choice words, chuckled a little bit, grabbed a beer then laughed some more. It was even funnier when a couple cars passed by. You could see them thinking... WTF?
And no, I didn't need the drive shaft.
Sometimes you get a little check on learning and a reminder to ALWAYS remember safety when working on your vehicles. This could have ended much worse but no one was hurt and nothing was damaged. It just ended up being a funny story and a reminder to be safe.