Common themes include jokes of the form "Im in ur noun, verb-ing ur related noun." Many lolcat images capture cats performing characteristically human actions or using modern technology, such as computers or gaming consoles. There are several well-known lolcat images and single-word captions that have spawned many variations and imitations, including "Ceiling Cat" and "Cats That Look Like Hitler". Others include "Fail" and "I Can Haz Cheezburger."