Jigoku-chan has a pocket watch as a memento. He pretends to brag about how expensive it is, and then hypnotizes her by swinging the watch from side to side like a pendulum. He hypnotizes her by swinging the watch from side to side like a pendulum. You can't be too careful, can you?

形見の懐中時計もっている地獄ちゃん。 ねえ、これみてすごい高価なものですのよと自慢するとみせかけて振り子のように 時計を左右に揺らして催眠術をかけてしまうんだ。気がぬけないよね。