Went over railroad tracks and i dont have a spark now

Exactly what the title says i went over and now i have no spark but power goes to the coil pack, what do you think would be the problem. I have a 92 sierra with a 350.

How about year and engine for some meaningful input from AF?

Did you check coil wires? Did you start with the basics - check spark with a good spark tester? - check if you have power going to coil(s) when ignition key is in "ON" position? - most of the time it is something so simple that once you find it you want to smack yourself upside the head for not thinking of it sooner. Always start with the basic things before going too deep. Let me know how you make out!