Used when talking about movements where feet lead the body, often to prevent falling. When getting into the kayak, she went in feet first to keep her balance.
Pro Tip 2/3
Caution Emphasis
Emphasizes a careful approach when someone is doing something potentially dangerous or unknown. Entering the cave, the climbers went feet first, checking for stable footing.
Pro Tip 3/3
Literal Use
This adverb is often used in a literal, physical sense, rather than metaphorically. He entered the cold pool feet first to get used to the temperature slowly.