It must confuse English learners to hear phrases like, "I'm home", instead of "I am at home." We don't say I'm school, or I'm post office.

There’s a song with the lyric “If you need us we’ll be backyard in our new tree fort” and it fucks with me that it sounds as okay as it does. Reckon it makes a little more sense when the place-word includes a relative direction, like in “upstairs” or “courtside”.

I have heard some gems in the wild though, like “Ima go run bathroom”.