Trainspotting on a footbridge... that reminds me.
When I was young they built a new residential area in my city, it was to have a new train station but it wouldn't be built for a few years because the railway was about to be widened from 2 to 4 tracks. So they put up a temporary station, and it had just such a wooden footbridge. Once I stood on the bridge while an Intercity came through at 140 km/h.... the whole bridge was shaking like it would collapse. Never again.