After the king had left he began to reflect. Had the sage withdrawn his senses and actually been in trance? Or was it fake trance? What would be the reason? One should not think that the king had committed a sin because of bad habits. It was the desire of the Lord to bring Pariksit quickly to his side, by having him become detached from the world by the curse of the sage, having him take the association of Sukadeva, and appearing in the form of the Bhagavatam, in order to deliver the world and give a taste for the pastimes such as rasa-lila that he performed to some devotees who would be born later in Kali-yuga. This is stated by the wise. This is understood from Pariksit’s later statement:

tasyaiva me ’ghasya paravareso
vyasakta-cittasya grhesv abhiksnam
nirveda-mulo dvija-sapa-rupo
yatra prasakto bhayam asu dhatte

As he was thus thinking, he heard about how he would die from the bite of Taksaka because of the curse issued by the sage's son. He considered it beneficial that soon the fire of Taksaka would be the cause of detachment from material life. SB 1.19.4

This also shows that the sinful actions of his pure devotee which are committed accidentally lead to benefit in the future.

yada yada hi dharmasya glanir bhavati bharata |
abhyutthanam adharmasya tadatmanam srjamy aham ||

Whenever there is destruction in dharma, O Bharata, and a rise in adharma, I manifest my own body. BG 4.6

Pariksit’s condition was produced by the Lord himself, in order to create an apparent reason for the Lord’s appearance in the form of the Bhagavatam. Pariksit never had such conduct, even his dreams. Thus it is said that this was something he had not experienced before (verse 29). His state of anger did not arise from bad karma, since the result of this act was the great fortune of meeting Sukadeva. Nor should one say that the cause was his great thirst. A moment later, without drinking water, being pained by a hundred repentances, he returned home and immediately fasted till death. Since he was filled with spiritual power in birth and death, and had conquered time in his middle age (by restricting Kali), he must be considered to have exceptional strength by the mercy of the Lord.