A Funny Thing Happened on the Way to the ER

Kenny: I've thought of a way to get the bagel out without burning my fingers.
Mom: How's that?
Kenny: I use a knife to stick it down in the toaster to get the bagel out.
Mom: Why is that not a good idea?
Kenny thinks for a minute: Because it would get the knife superheated?
Mom: No, the knife is a conductor of electricity and you could be electrocuted.
Kenny: Oh...