I bought a chefs knife today; knives excite me and frighten me. What excites and frightens you at the same time?

I saved points to get the knife and was thrilled to get it.
It is big and pointy and razor sharp I accidentally cut my finger already :-).
The design, and the usability of it I love.
The danger (the ability to severely hurt yourself accidentally) and the potential lethal weapon it can be, frighten me.
Have you got similar object/products that simultaneously scare and joy you?