I thought I fully understood katakana, but an old meme confuses me.
Here is a nicovideo dictionary entry on it: フタエノキワミ、アッー!
If you listen to a video of the English voice actor saying it, it just sounds like a normal "aaaaaa" which I would expect to be アー. I know アッ is already "ah", but elongating that seems impossible to me. Why isn't it something like アーーッ? Maybe I'm overthinking this because it's a meme, but this spelling was agreed on, so there's clearly some construct to the language that makes this normal.