Spontaneous skits are a form of improvisational theatre, where actors create scenes on the spot without any prior preparation. The two most common forms of spontaneous skits are IMPROV and IROV, both of which require quick thinking and creative problem solving. IMPROV stands for 'improvisation', and involves actors creating scenes in response to audience suggestions. IROV stands for 'improvised role-playing', and involves actors creating scenes based on predetermined roles and scenarios. Both forms of spontaneous skits require actors to think quickly and come up with creative solutions to the challenges they face.