I recently watched episode 252 of Gintama and in the "sorry montage" (around 15:06) the first scene was this clip with Shinpachi apologizing with Okita and Kagura.
Could anyone tell me which arc or episode this was from? I can't seem to remember and it's driving me crazy.
While reverse searching the image, somehow I found a single site with the exact scene (but Chinese subtitle) on Baidu.
I can't read Chinese, but with the help of Google Translate, it seems all of them answering with episode 20*, "Watch Out For Conveyor Belts!"
*according to Wikipedia: Gintama (season 1), episode 20.