Keepers protect the ancient ruins and include tiny Beepers and the evil Zero. "Seminar", released in 1989 featured "My Hooptie", "Beepers", "Gortex" and "I Got Game". Beepers top lists of complaints to government roadbuilders about road construction noise. As they lean in for a kiss, their beepers go off with calls from Wesley. Instead of putting and picking beepers, Karel the Dog puts and takes tennis balls. Back-up beepers are criticized by the public and in scientific literature. Scientists use beepers to remind volunteers to write down the details of their current situation.