I recall seeing an episode of TAS when I was very young -- 6ish -- and can someone help me out here by telling me if there was ever an episode of TAS where this happens: Kirk and party are on a planet's surface and are following a signpost's direction arrow. When they pass out of frame, the signpost descends into the ground and re-emerges, pointing the other direction.
I've been trying to clear this up for years -- is there an episode like that, or did I make it up in my mind?
Anyway, the first episode I clearly remember is the TNG Episode "Identity Crisis." I was maybe 8 at this point. That episode terrified me -- the blue alien Geordi was turning into, of course, was frightening, but for some reason I was REALLY chilled to the bones when he's in the holodeck piecing together the footage of the away mission, and the computer creates that clay-looking sculpture of a man out of nowhere. My 8-year-old self was pretty creeped out, but then I was a bit sheltered.