I used semi-stand development (only about an hour) for developing my sheet film of the solar eclipse this spring. Mixed a dash of Maxim Muir's Compensating Pyrocatechin, agitated one minute, then the doorbell rang. and the door was unlocked...

So I simply put the lid from a pack of paper over the tray, and sneaked out the door trying to open it as little as possible.

As my unexpected guests were my parents, I could not really tell them to go away and come back later?

Eventually I got back to the darkroom and got a look at the negative: Perfect!

So that's what I'll do the next time I need to capture an SBR of >25 on film: Invite my parents over