Greetings,
I made my 13th jump on a friday the 13th back in the early 80s, then to make matters worse, after counting the spot I was in, you guessed it I was the 13th person out and the 12th and 14th would not change with me. The jump could not have been more perfect.
The next day however I experienced a partial malfunction. My lines were tangled which I worked my way out of, only to encounter a tree landing.
some 25 years later, this ole paratrooper, does easier things like play black jack. maybe I can learn from history and play on friday the 13th just avoid them on Saturday the 14th