Was it the jalapeo pizza for lunch, or the Texas chili you pigged out on for supper? It didn't matter much. The cause was not high on your list of concerns at 1am; your number one priority was putting out the fire of heartburn. Caliente!
Heartburn is not necessarily something to avoid. Travelers unexpectedly met the resurrected Christ Jesus as they walked and discussed their experience. "Weren't our hearts ablaze within us while He was talking with us on the road and explaining the Scriptures to us (Luke 24:32bHCB)?"