[The moment Rin finds a smaller tunnel she dives for it like a baseball player stealing home. Tohsaka yelps as the tunnel curves slightly, but luckily enough that means it'll be difficult for Dimitri to reach his hand in. The diminutive "cave"-looking passage way is just barely big enough for Rin, and clearly won't allow Dimitri's broad shoulders pass.]
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...Ah. Ah-haha. Am I safe?