Sometimes when you hide a gun, or a held item (like the compass) and switch to another gun/item, others will see you stuck in the animation of changing weapons. It basically looks like the character was rapidly and endlessly juggling items.
It seems to happen most often when you switch the weapons/items while having them lifted up (by default with Space).

It's kind of debilitating cause it looks silly and others can easily spot the rapid movement wherever you'd hide, and you yourself aren't aware that you're ''juggling''.