You could convert it to archival washing and call it the Niagara method. Those old outside toilets usually had a 3 gallon cistern about 8 feet off the ground so one pull of the chain and you got a biblical flood
Lol. I know what you mean, though there would be so much force, it would probably strip the emulsion clean-off the negative!!!
"All I ask for is an M5 with a fast lens, a roll of HP5 and a street to shoot her by."