Near the start of the episode we visited Nodoka, who is in a dream. She realizes that she is in a dream; and she sees her Achiga friends, but looking like how they were when she left them for Kiyosumi.
The joke gets a little clearer when later in the episode, Toki goes into a flashback about her “see a turn ahead” power and how she fainted trying to stretch it into “see two turns ahead.” When she wakes up, she wasn’t sure if it was a dream or not, so she reached and grabbed Ryuuka.
That just seemed odd, but now, I GET IT GUYS.
I also realized why it didn’t hit me the first time I saw it: during Nodoka’s dream sequence she actually rationalizes it out verbally as to what is actually odd in her dream. And naturally I wrote away the fact (or was I rather distracted?) that her “downward view”/grab is just, well, fanservice. Or rather I should say, what makes Nodoka who she is.
For more insightful connecting-the-dots from Saki Achiga-hen, check out Yaranakya’s analysis.