The yellow line at the train station is very dangerous.
You walk over it and fall on the track then the train runs over the top of you and squashes you like a creepy crawler, and your bones come out. Then a helicopter comes and saves you.
Okay.I may never get him on a train again.
However this is the same child who, sitting in the pushchair on a perfectly flat, very wide footpath, with no other people or cars around, yelled “QUICK MUMMY, put my seat belt on or I’ll fall out of the pushchair and roll along the ground and fall onto the road and get squashed flat by a car!!”.