Meaning: (a person or a thing) fall down (from above).
Different ways of signing, often using a locative classifier phrase.
A person (or sometimes something) falling down).
Classifier verb: (person) fall to the ground, where the dominant handshape depicts a person and the passive one represents a surface.
Inflect the ASL verb FALL-DOWN and/or use a classifier handshape where grammatically appropriate.
For example in the video above, it means a person falling down (dominant-handed classifier) something such as a water well or underwater well or any larger container than human size (passive-handed classifier).
Review 101 words. Refresher.