[elhigh]

On the topic of collisions, that reminds me of the book "Rust: The Longest War" by Jonathan Waldman. There's a chapter in there about the Alaska Pipeline, particularly talking about the "pigs" they send through the pipeline on a regular basis to inspect the condition of the pipe.

Sometimes the pigs come out in pieces. Occasionally, very occasionally, they somehow switch places so the pig that was sent through first comes out last. Very odd.

And if I recall correctly, there was one pig that went missing and hasn't been found. It's been gone for years. Nobody knows where it wound up. It is supposedly still in the pipe. How that could be possible when the pipeline is still passing oil is anybody's guess.

Now: who wants to volunteer to ride in a 700 mph pig?