To build the bridge. To drive the train across it. To hear the lamentations of the passengers.

If you have an Android phone, you need to get your mitts on Xconstruct. its a game that gives you some girders and stuff, and you build a bridge, and if you did OK, the train crosses.

here’s the best part: if you fuckup, the train crashes to the ground, and you can hear the passengers screaming.

There’s a free version that you can build I think eight bridges,m then it stops working. The whole ball of wax costs $2 so it’s worth it, once you get hooked on the free one.