If he is still not using the legs in the morning get him to the vet. There is no other way to know what sort of damage he sustained if any. Iguanas are arboreal and fall from time to time.
By Bamboo are you referring to the "Lucky bamboo" that is sold with stalks tied together in a water container? If so that is not a true bamboo but a dracaena species. I don't know about that particular one but some dracaena are toxic.
The idea of live plants is one shared by many keepers, however it isn't really viable. The iguana will destroy the plants.

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Merlin,
What's Life Without A Little Magic!

Thanks a bunch for the advice. I plan to take him first thing in the morning if needed. My husband made a quick fix tonight to expand his shelf until the new is made. He looks quite content at this time. Thanks for the info on the bamboo, I never realized the ones tied together were not the real thing. I think I will probably stick with the Pothos if any real plants. Thanks again soooo much. I will keep you updated on Iggy's condition tomorrow.