Insomnia was originally released by British dance act Faithless in 1995 and became one of the most famous trance and house tracks of the decade, known for its restless piano riff. DJ Tiesto's version helped carry that riff to a new generation of club and festival listeners in the 2000s. Online, short excerpts like this one are reused as instant dance music shorthand, signalling a rave, a sleepless night or a joke that suddenly turns into a party. Its familiarity makes it work even in very short edits.