OK, jam is a strong word, but Flea did let the famous KoKo the gorilla take his bass for a ride when visiting the Gorilla Foundation in Woodside, California on Friday.

Check it out here: http://www.dailymail.co.uk/news/article-3751251/She-gets-Red-Hot-Chili-Peppers-bassist-Flea-rocks-Koko-gorilla-SHOCKED-skills.html