Seeing that feat undertaken by Chyavana, Indra became enraged. Taking up a huge mountain he ran against that Rishi.
तत् तु कर्म समारब्धं दृष्ट्वेन्द्रः क्रोधमूर्च्छितः। उद्यम्य विपुलं शैलं च्यवनं समुपाद्रवत्॥