Can someone help diagnose a weird issue that happened to me today?

[La Zona Imagery]

I was driving my truck today for about 10 minutes when all of a sudden, the tach started stuttering. The engine felt like the truck was running out of gas (i had a full tank). Then all of a sudden the engine died, and smoke started coming out from under the dash. I was able to restart the engine, and pull over to the curb. Ten seconds later, after the restart, the engine died again.

I opened the hood, but nothing seemed to be out of place. No smoke either in the engine compartment or inside the cab. I waited for about 10 minutes, restarted the engine, and everything worked fine again. I was able to drive back home with no issues.

Any ideas on what might have happened? The only thin out of the ordinary was right before it smoked, I drove over a rail crossing a bit too fast, and the lower a-arms might have slightly scrapped. But I do not see how that could have cause the engine to die or the smoke to occur.