The standing up of hair on the body was manifested when Mother Yaśodā found within Kṛṣṇa's mouth all of the universal planetary systems. She had asked Kṛṣṇa to open His mouth wide just to see whether He had eaten dirt. But when Kṛṣṇa opened His mouth, she saw not only the entire earth, but also many other planets within His mouth. This caused a standing up of the hair on her body.
The standing up of hair on the body resulting from jubilation is described in the Tenth Canto, 30th Chapter, 9th verse of Śrīmad-Bhāgavatam in connection with the gopīs engaged in the rāsa dance. During this rāsa dance Kṛṣṇa disappeared all of a sudden with Rādhārāṇī, and the gopīs began to search Him out. At that time they addressed the earth and began to say, "My dear earthly planet, how many austerities and penances you must have undergone to have the lotus feet of Kṛṣṇa always touching your surface. I think that you must be very jubilant because the trees and plants, which are just like hairs on your body, are standing up so gloriously. May we ask when did you first get these symptoms? Are you enjoying this jubilation since you were touched by the incarnation of Vāmana or since you were delivered by the incarnation of Varāha?"
Kṛṣṇa would sometimes perform mock fighting along with the cowherd boys. When Kṛṣṇa blew His horn in this mock fighting, Śrīdāmā, who was on the opposing side, felt his bodily hairs stand up. Similarly, when Arjuna saw Kṛṣṇa in His gigantic universal form, there was a standing of the hairs on his body.
Faltering of the Voice
When Kṛṣṇa was going to Mathurā on the chariot driven by Akrūra, Yaśodā and all the gopīs came to try to forbid Him to pass and to block His way. At that time Rādhārāṇī was so perturbed that in a faltering voice, She requested Mother Yaśodā to please stop Akrūra.
Faltering of the voice resulting from wonder was exhibited by Brahmā. It is said in Śrīmad-Bhāgavatam, Tenth Canto, 13th Chapter, 59th verse that, after bowing down before Lord Kṛṣṇa, when Brahmā began to rise he prayed to the Lord in a faltering voice.
In the Tenth Canto, 29th Chapter, 27th verse, another example of faltering of the voice was exhibited by the gopīs when they came to Kṛṣṇa, desiring to dance with Him. Kṛṣṇa asked them to go back to their husbands and homes. The gopīs apparently became very angry and began to talk to Kṛṣṇa with faltering voices.