I save the day by keeping a few friendly NPC character sheets at hand for the dire times when the ranger is approaching -9, rogue is at -6, and the fighter down to 3 hit points. Foolish party of level 2, 3, and 4 on a scouting mission deciding to assault a Cleric 5 with a dozen skeletons and zombies. So I had a fox shapechanger (kitsune) NPC appear they befriended a few sessions ago. It more or less made sense because he's supposed to be the guardian of the area, but unfortunately it did look a bit like the DM's saving the party. I'll have to figure out what to do next time.
As for the dice, the last few sessions I must have rolled an average of 15 or higher, where as one of my players (the ranger at -9) must have rolled an average of 3 or 4 on a d20. It was amazing. At one time, he does his two weapon fighting thing and rolls... 3 and 3! And then the zombies rolled something like 15, 17, 19, 19, 16. It was all out in the open and terrible to behold.