Watching them work will make the boss angrier and angrier until he erupts! Fortunately, the concept of eruption is now fully embedded in our daily lives, although some afiics tend to trigger manufactured and more harmful eruptions. They also made some smaller eruptions, for instance the famous "village hole" : it looks like a regular hole from the outside but in fact it is a living creature, it is angry all the time but is never going to attack anybody directly. Instead, he usually summons three jolubons.