This is how Ryan and Twilight get trapped in a cave goes in My Little Pony Transformers: Revenge of the Sith.
[We see Ryan and Twilight heading to a cave on a mission from the Autobots]
Ryan F-Freeman: This must be where the signal is from, Twilight.
Twilight Sparkle: Let's go.
[They enter the cave]
[Starlight, Trixie, Thorax, and Discord arrive later]