Sucking his cock while the train passes next to us

We went for a good time outdoors. Soon he found a good spot and I kneel in front of him and start sucking his cock. It is pretty big and thick and he pushes it rough in my throat, making me gag and spit a lot of saliva. Just when I was sucking his cock very hard two trains passed by us and the conductor saw us and blow his whistle. PC65