American inventors have transformed the world with innovations like the light bulb, the transistor and the pacemaker. But they also dreamed up the dog umbrella, Silly Putty and the Pet Rock.

Daniel Radcliffe reflects on hosting NBC's "Saturday Night Live" the same show as Lana Del Rey's infamous TV performance in 2012.

When comedy goes perfectly wrong! Join us as we count down the most hilarious moments when SNL cast members couldn't hold it ...