Working around loud looms or fast-paced environments can lead to some hilarious misunderstandings.
I once heard ‘weft stop’ as ‘left stop’ by the beamer and sent a pallet jack the wrong way — felt like charades with looms. We made little lanyard cards with hand signals and a red STOP paddle; small caveat, we still point at the exact loom first to avoid acting on the wrong cue — does that match your setup?