I think this became more or less of an unwritten rule when we lost the whole group of PCs due to failing a single *Climb* check (DC 15; two PCs fell short by *one*) and everyone fell to their deaths -- probably the most embarrasing TPK I've ever heard of.Yeah, we had already beaten almost every monster in that place, and then we are killed by a... steep cliff.
I played in a game of CP2020 once and while I did survive character creation, the first firefight within 5 minutes killed me. So I became the OTHER skate punk who dealt happy for our Fixer, just changed his name.
The end of the night had our group in 2 or 3 vehicles. The solo on his motorcycle made the jump across the small ravine while we were being chased, I think I was on a motorcycle with someone else and we had the rest of the group in a truck. The rest of us ended up in a fiery pile at the bottom of the ravine. I believe the female who was riding with the solo was who we were trying to sneak out of the area, so mission accomplished, but it was more like a CoC game. One person lived heh. Altho he had his sanity, so maybe not perfect

Sorry, unrelated but I had to share.