I'm looking to identify a movie or more probably TV series episode I saw in the nineties.
In this movie, two (possibly young) adults are in some kind of cave or rather tunnel, when a mysterious blue/white flashing thing bursts through the tunnel. That flash has the effect of teleporting them somewhere, and they wake up on a beach, and they see the sun setting in the ocean they are looking at from the beach. The following conversation goes something like this: -How long have we been asleep? The sun is setting already! -That's not sunset, it's sunrise! -But that means we are on the east coast now?
The gist of the conversation is that the sunset/sunrise is wrong for the coast that they live on, and they conclude they have been teleported to the other side of the continent.
I vaguely remember another scene that involves spiders (not big horror-film type, just regular size spiders) and that being bitten by them has some influence on what is happening. But my memory is very hazy here.