That's not true punk rock. If in tunnel testing, anything comes through, it means that the track is in the train's "personal space" if you will. If it's a small tunnel to tunnel collision, it's not too much of a worry, but youy want to clear that up just to be straight. If you see a support in a tunnel at all, it needs to be edited because unlike a tunnel collision, it means that someone with long arms, like myself, or possibly a person with a shorter wingspan, can reach out and touch that support and you don't want that to happen at 60 mph. All other collissions are obvious, so good luck!