On accident
I kind of can’t take people seriously when they say On accident, I don’t know or care if its more or less grammatical, it sounds like a child sputtering in my mind. It should be By accident or accidentally
Tummy
Any adult has zero business saying this lol
That’s the official recommendation from LEGO as well. I found a piece of paper that mentions this in the box of one of my dad’s old LEGO sets.