what opinion do you want to have.
that trains lurch when going fast over junctions?
that trains going fast over junctions= broken rails?
that if trains lurch people get jostled about?
that trains going fast over junctions is dangerous?
that trains are dangerous?
You are entiltled to your view on all the above. It does not however mean that all your views are correct. Your views on 1 and 3 are probably correct, bassed on repeated observed cause and effect. Your view on 2 is almost certainly biased by one incident close to you. You are however unlikely to have much experience to draw any meaningful scientific conclusion. In this respect you are uninformed and your view, scientifically, counts for nothing. 4 and 5 are unquantified. 4 is a qualification of 5. It may be your view that 4 is more dangerous than 5, but still unquantified and therefore to all intense and purpose meaningless for most scientific purposes!
Sorry if thats confusing, but thats the way it is. Neither does it mean that any of your views and experiences are any the less valid for you.