"Once while they were engaged in their transcendental pastimes, a great demon of the name Pralambasura entered their company, desiring to kidnap both Balarama and Krsna. Although Krsna was playing the part of a cowherd boy, as the Supreme Personality of Godhead He could understand everything--past, present and future. So when Pralambasura entered their company, Krsna began to think how to kill the demon, but externally He received him as a friend. "O My dear friend," He said, "It is very good that you have come to take part in our pastimes." Krsna then called all His friends and ordered them: "Now we shall play in pairs. We shall challenge one another in pairs." With this proposal, all the boys assembled together. Some of them took the side of Krsna, and some of them took the side of Balarama, and they arranged to play in duel. The defeated members in duel fighting had to carry the victorious members on their backs. They began playing, and at the same time tended the cows as they proceeded through the Bhandiravana forest. The party of Balarama, accompanied by Sridama and Vrsabha, came out victorious, and Krsna's party had to carry them on their backs through the Bhandiravana forest. The Supreme Personality of Godhead, Krsna, being defeated, had to carry Sridama on His back, and Bhadrasena carried Vrsabha. Imitating their play, Pralambasura, who appeared there as a cowherd boy, carried Balarama on his back. Pralambasura was the greatest of the demons, and he had calculated that Krsna was the most powerful of the cowherd boys.
In order to avoid the company of Krsna, Pralambasura carried Balarama far away. The demon was undoubtedly very strong and powerful, but he began to feel the burden, and thus he assumed his real form. When he appeared in his real feature, he was decorated with a golden helmet and earrings and looked just like a cloud with lightning carrying the moon. Balarama observed the demon's body expanding up to the limits of the clouds, his eyes dazzling like blazing fire and his mouth flashing with sharpened teeth. At first, Balarama was surprised by the demon's appearance, and He began to wonder, "How is it that all of a sudden this carrier has changed in every way?" But with a clear mind He could quickly understand that He was being carried away from His friends by a demon who intended to kill Him. Immediately He struck the head of the demon with His strong fist, just as the King of the heavenly planets strikes a mountain with his thunderbolt. Being stricken by the fist of Balarama, the demon fell down dead, just like a snake with a smashed head, and blood poured from his mouth. When the demon fell, he made a tremendous sound, and it sounded as if a great hill were falling upon being struck by the thunderbolt of King Indra.
All the boys then rushed to the spot. Being astonished by the ghastly scene, they began to praise Balarama with the words "Well done, well done." All of them began to embrace Balarama with great affection, thinking that He had returned from death and they offered their blessings and congratulations. All the demigods in the heavenly planets became very satisfied and showered flowers on the transcendental body of Balarama, and they also offered their blessings and congratulations for His having killed the great demon Pralambasura."
Krsna Book, Chapter 18
Bhaktivedanta Book Trust. Excerpted from text and purport of HDG A.C. Bhaktivedanta Swami Srila Prabhupada.