A well trained Volitan will likely eat your watch if you drop it in the tank. It will react to you just as an Oscar does, and it will learn from experience that whatever hits the water is probably food, including flakes. Which means you have to be extra careful around it, since it will generally want to come towards instead of away from you, which is a good way to get stung if you're not paying attention. They train rapidly if kept alone in a quarantine tank, and a month's qt should be all you need to have it eating out of your hand, which I wouldn't recommend actually doing.