Bonus Lay/Lie Facts The action of lying down does not require that one be a person, as some people mistakenly (and, I think, oddly) believe. I lie down. Fiona the hippopotamus lies down. Pat the bunny lies down. One doesn’t, in present-tense hiding, lay low or, in ambush, lay in wait. It’s “lie” all the way: I lie low; I lie in wait. That said, one does lay a trap for one’s enemy, and given the chance, one will lay that enemy low.