bhumyam-on the ground; nipatitau-which had fallen; tatra-there; dadrsuh-all of them saw; yamala-arjunau-the twin arjuna trees; babhramuh-they became bewildered; tat-that; avijnaya-but they could not trace out; laksyam-although they could directly perceive that the trees had fallen; patana-karanam-the cause of their falling (how could it have happened all of a sudden?).