The three mechanisms
They're three different events with three different fixes:
- Slip — your foot loses traction with the surface. Wet floors, spilled oil, ice, loose gravel, smooth soles. You slip when there isn't enough grip between your boot and the ground.
- Trip — your foot catches on something and stops while the rest of you keeps going. A raised floor edge, a hose, a stack of material, an extension cord, a curled-up mat.
- Fall — you lose your balance and hit the ground or a lower level. A slip or trip often ends in a fall, but you can also fall off an edge, through a hole, or down a set of stairs.
Falls split two ways: a fall on the same level (you land where you were standing) and a fall to a lower level (off a platform, into a hole, down the stairs). Same-level falls are more common; lower-level falls are more likely to be serious or fatal.