Just stumbled across this quite by accident while doing some Google image searching for vintage baby gear items. This adult size baby bouncer model was part of the Baby Bjorn display at the ABC Kids Expo held in Kentucky last month: Look! Baby Bouncer For Adults | Apartment Therapy Ohdeedoh
This is just what the AB market could use, judging by interest shown on ADISC for teen/adult sized baby gear items. Sounds like the adults who tried it out loved it! Wish I could have been there!