I have a made a quite standard beamer (3.12) presentation. To make my long academic presentation a bit more interesting I have inserted some (really, only two or three) slides with "random" pictures like lolcats to keep it a bit humorous.
Now I want these slides to be a surprise, so they should not be visible on the handout. How can I prevent these slides to be included on my \documentclass[handout]{beamer}
version?