It’s standard procedure to do a pre-flight check of your aircraft. Unfortunately, this pilot was only human and didn’t catch that he had a not-so-human stowaway on his open-cockpit glider.
Shortly into the flight, the stowaway - a cat - makes its way toward the cockpit from its hiding place in one of the vehicle's hollow wings. It’s not long before the pilot notices the now-airborne furball and you can see the remorse of the poor, terrified creature.
Soon after the discovery, the craft was brought to the ground with the little animal scared, but unharmed. It has apparently become the mascot of the aviation school that owns the glider.