That's a really good point, it literally never even crossed my mind that it is, in reality, the same form of experience as DD/DC. I do wonder if there was more to that story than just 'oh things falling out and hitting the other train', it appears to have been a catalyst to the problem rather than just the problem. If they wanted to keep them, they could have even added some form of netting (hey, we've seen worse!) or something. So it says to me that they wanted out of the ride for one reason or another.