Mirror, Mirror, Made Out of Glass, How Did I Get Such a Giant-Sized…

27 Covers Having Some Fun with Funhouse Mirrors

Quoth the Wikipedia:

“A distorting mirror, funhouse mirror or carnival mirror is a popular attraction at carnivals and fairs. Instead of a normal plane mirror that reflects a perfect mirror image, distorting mirrors are curved mirrors, often using convex and concave sections to achieve the distorted effect. Because of their distorting properties, they are sometimes featured in fiction as a literary device, such as in Hans Christian Andersen’s The Snow Queen.” 

Or, when the fancy strikes an artist, on the cover of your favorite comic: