Ninjas are well known for showing up and disappearing just like that, being the silent killers that they are (including heart attacks). Where do you think you are safe from them? Underwater? Guess not, not when you have the Aqua Ninja ready to spring a surprise on you whenever you are near water. Gotta lover the uber cute posture as well as design, although the $30 price tag is rather off-putting for a standard plush toy.
Source: Nerd Approved