During a segment on the newly reopened Crumbs Bake Shop, Sam Rubin showed off his cupcake-eating technique after Eric Spillman got it backwards. Spillman said that he eats the top of the cupcake first, but as Rubin showed, he actually cuts off the top and flips it over onto the bottom of the cake, ensuring “better frosting distribution.” Regardless of how you eat a cupcake, Crumbs is offering KTLA viewers a special deal Tuesday. Just mention KTLA at the Larchmont shop, and you’ll get a “Buy 1, G