Ranma + Skuld + Ice Cream = Uh oh

[Ran]

This one doesn't exactly fit what you're looking for, but I thought I'd show it anyway for a potential chuckle.

Skuld's Fix

(My memory for these things hasn't completely died, yet. <_<; )

That is the fic that I immediately thought of when Skuld and Ranma were brought up.

[Té Rowan]

There is a fic named The Stallion that has such an uh-oh moment: Ranma+SM+TM+OMG=!!! Possible locations:
http://www.anifics.com/hosted/phu/
http://www.anifics.com/hosted/ranmaxovers/
http://ranmaxovers.tripod.com/
http://www.patchmonkey.net/fanfic/