Enjoying Onsen, Japan's natural spas, is one of the great pleasures here. My husband and I went to Kinosaki Onsen which is 160km away to the north and 2.5 hours by express train from Kyoto City.
Besides the baths, there's a tiny spot where you can try cooking an "Onsen egg." You buy a raw egg in a small shop by the well, put the egg into a net, submerge it in the well water, which is 80 degrees Celsius (176 Fahrenheit), and wait for 10 or 15 minutes. At this water temperature, the egg white turns to jelly and the yolk becomes soft boiled. You remove only the top part of the eggshell and eat it with a spoon.
Near the spoon stand, there was a sign "Don't grip the egg too hard when you remove the shell."
In spite of the sign, my husband gripped his egg tightly while trying to peel the top part. In that instant, his egg shattered and he got a white and yellow bomb to himself!