It happens. Glad no one was hurt. I have a similar stupid story... My previous car was a manual 2013 VW GTI. 1st and Reverse are in the exact same position, except you press down on the shifter and shift into 1st to get into reverse. I was at the local drag strip for a test and tune day, and I overshot the line a little on one of my runs and had to go in reverse to get back into position... During the count I looked and the shifter was in the correct position for 1st... Yeah, I forgot to shift back into 1st from reverse. So the light turns green and all of the sudden I find myself rocketing backwards while my competitor shoots down the strip. It was... Very embarrassing. Luckily I stopped quickly and was able to get going forward. Needless to say, I immediately left the drag strip.
Just like Ready Player One (the movie, not the book)