it's funny because recently i screen captured Riho's panic face and meant to post it, but never got around to it. it was from KuroBara, when Nakai said he thought she was saying ShiwaShiwa Pon (Wrinkle Wrinkle Pon) to Nakazawa.
but of course, it doesn't compare to her shock/panic from the 11ki audition announcement. guess she hasn't been on the HelloPro Train long enough to predict what the next station is gonna be.