Night lightning

I know this looks like a composite, but it isn’t. I was staying in a B&B in San Miguel de Allende, Mexico, and had gone to bed at 10:30pm. Sometime later thunder woke me up, and I thought as long as I’m awake, I’ll set up my camera on a tripod and maybe I’ll be able to catch some lightning. My room was on the second floor and had a balcony. I repeatedly took 30-second exposures until the storm abated. Most of the frames were duds, but when a powerful bolt of lightning either struck the church or struck near it – I couldn’t tell -- I captured it during the long exposure. I took this image with a Medium format film camera, the Mamiya RZ 67, and the f/stop wasn’t recorded but it was probably f/11. I used Fujichrome Velvia film which had an ISO of 50. I didn’t bother using a cable release, even with a slow shutter, because if there were any vibrations introduced by my finger pushing the shutter button, the camera’s brief movement would be a very small percentage of the 30-second exposure and would, therefore, be irrelevant