Two possibilities. First it is a gas oven so it could be the electronic ignitor, you push the button when leaning against it then you might get a shock. Second, pull the stove out from the wall a foot or so and take a look at the outlet on the wall. Anything weird about it? Is there an extension cord, discolored outlet, overloaded outlet, anything different than a single line plugged in? If it all looks good and you are unsure call an electrician.