34th Single Special - Janken Tournament
If you've seen it, then there's a portion where Yuki is interviewed backstage (??) and she talks about her decision (whether to throw rock, paper or scissors in the tournament)
Yuki says that during the Osaka live (one of the MCs) Mayu said that she would throw out paper so from the begining throwing scissors was out because even though it's a showdown between the two of them, since Mayu already said that she would throw out paper Yuki wouldn't throw out scissors.
If Mayu throws out paper like she said she would and Yuki throws out paper as well, then it would be a draw and Yuki thought that it was quite a good way of protection (skipping some bits)
But through the process of elimination she decided to throw rock; so ultimately the end result would depend on what Mayu threw out at that moment.
And apparently Mayu herself forgot about the whole thing (saying that she would throw out paper) and after their match, Yuki asked Mayu about it and she told Yuki that she (Mayu) decided what to throw out then and there, on the spot and Yuki found that statement a bit too much [Notes: Was it because of all the time Yuki spent agonizing over what to throw out?]
Apologies for any mistakes because I'm better with written than spoken, have gotten rusty...
EDIT: It was the cameraman/ someone else who said "That's a little too much" but in any case Yuki probably won't get angry with Mayu over something like that