Improv could be thought of in terms of evolution, where every tiny little yes-and adds to the scene, so that it starts as a simple suggestion and ends up as something complex and fantastic. The "environment" that shapes the scene in this situation refers to the audience suggestions and people in the group, as well as the world the scene has created for itself. Not all offers create things that are useful to the survival of the scene, but these usually become less important than those that really help the scene take off. Obviously some scenes end up going down an evolutionary path where they become extinct or peter out to audience indifference, but even scenes going in these directions can still learn to adapt. It seems then that, when starting a scene, we should aim to end up with dolphins or humans, not dodos or dinosaurs.
Anyway, this is the latest hair-brained theory I am toying with and I fully expect disagreements from fundamentalist Christian improv groups who believe scenes are given to them fully-formed by God. Although we've all been in scenes we know did NOT come from God; or if they did come from God, then God's one sick mother mofo. Anyway, feel free to expand or refute my theory and also discuss if the picture really does represent the worst improv scene ever? (Hint: The worst thing about it was that the Dodo and the Dildo didn't even know each other.)