prāharat kuliśaṁ tasmā
amoghaṁ para-mardanaḥ
sayāno nyapatad bhūmau
chinna-pakṣa ivācalaḥ
prāharat - inflicted; kuliśam - thunderbolt scepter; tasmai - unto him (Bali Mahārāja); amogham - infallible; para-mardanaḥ - Indra, who is expert in defeating the enemy; sa-yānaḥ - with his airplane; nyapatat - fell down; bhūmau - on the ground; chinna-pakṣaḥ - whose wings have been taken away; iva - like; acalaḥ - a mountain.
In many descriptions in Vedic literature it is found that mountains also fly in the sky with wings. When such mountains are dead, they fall to the ground, where they stay as very large dead bodies.