There are microfludic rectifiers that work kind of like this. (e.g. https://pubmed.ncbi.nlm.nih.gov/15089471/ https://pubmed.ncbi.nlm.nih.gov/15089471/ ) It wo

There are microfludic rectifiers that work kind of like this. (e.g. https://pubmed.ncbi.nlm.nih.gov/15089471/ https://pubmed.ncbi.nlm.nih.gov/15089471/ ) It would be neat to have a ride that somehow makes use of these diodes to do something interesting beyond delaying people.