Back in the day some German guys wrote Combat Basics to untangle the flow of combat encounters. If you roll a 1 on your (first) 1d10 roll, check for a possible Fumble (40% of the time, nothing happens) If you roll a 10, keep the 10, roll again and add. They didn't actually say so but you can do what we now call "cascade" if you get multiple tens in a row! <a href="https://www.cyberpunk2020.de/2007/07/25/cyberpunk-2020-combat-basics/" rel="nofollow">https://www.cyberpunk2020.de/2007/07/25/cyberpunk-2020-combat-basics/</a>