A weaker slipperiness is good enough.
:3
Edit: I'm not liking this stretch of silence...
[hider=Spoilers]Yuuki is only pulling their legs. She could have caught herself on the doorway easily, but decided to roll with the punches and make the fall appear worse than it was...which worked out great, especially since she has jam packets in her hand from breakfast that she burst hard against the doorway in order to fake hitting her head and bleeding. She actually intended to put the jam into somebody's drink, but meh, this works too.[/hider]
I'm heading off to sleeps, it's 4:45AM where I am now, good night/morning.