In 2007, Kristek initiated the series of happenings Requiem for Mobile Telephones to protest against the addiction to modern technology. The visitors were exhorted to renounce their ‘electronic pets' that then were drilled through by a three-breasted angel and became part of the artwork bearing the same title as the happening cycle. The assemblage changed shape from event to event.
In 2010, the artist travelled with his happening mission to Poland.