ततः स विस्मयाविष्टो हृष्टरोमा धनञ्जयः।प्रणम्य शिरसा देवं कृताञ्जलिरभाषत॥
tataḥ sa vismayāviṣṭo hṛṣṭa-romā dhanañjayaḥpraṇamya śirasā devaṃ kṛtāñjalir abhāṣata
Word by word
The verse says
Then Arjuna, filled with wonder, his hair standing on end, bowed his head to the god, put his palms together, and spoke.
In plain words
His body responds before he does.
Hṛṣṭa-romā — hair standing up. The one detail in the whole description that is purely physical.
And only after that does he bow, and only after that does he speak.
Where you've felt this · in relationships
You hear a piece of music and your arms go into gooseflesh before you have decided anything about it. The reaction arrives first. Whatever you later say about why it moved you is assembled afterwards, out of something that already happened to your skin.
Going deeper
The body registering something before the mind has caught up is the detail that makes this account believable.
Everything else in the description is enormous and unverifiable. This is small and recognisable: hair rising, hands coming together, a head going down, and only then speech. The sequence is the one bodies actually use. Nobody decides to have gooseflesh.
It also tells you what kind of event this is. Arjuna does not reason his way to reverence. Something happens to him and the gestures follow, in the order that bodies produce them.
Which is worth knowing when people ask themselves whether they have ever experienced anything of this kind. The test the verse offers is not an opinion you hold. It is whether anything has ever reached you before you had a chance to form one.