Alma and his brethren “fell again” to the earth. Certainly they were capable of rising at least somewhat, or they could not have fallen again. This further suggests that the falling to the earth was a cultural response rather than a physical weakness. It also perhaps suggests that they may not have arisen to their feet but rather perhaps to their knees.
It is also very interesting that once again the specific markers of the divine occurrence are repeated. We have once again the listing of the voice of thunder and the shaking of the earth. Both of those are again noted as proofs of the divine nature of the visitor.