Different towns have their own versions of the religious festival but Pampanga (north of Manila) is the most popular one because it boasts of actual nailings on the cross. It's not as bad as you think. The nails are quite small and they are thoroughly washed in alcohol before they are hammered into strategic areas of their hands to do the least damage. And their weight is supported on the cross by ropes on their hands and foot platforms. Of course, the pain is still real.