The killing of Kamsa scene in "Shree Brahma-Purana" accentuates the Divine Nature of Bhagavan Shree Krishna, as Lord Shree Krishna killed Kamsa by just falling on him.
Someone may think that Lord Shree Krishna is lean and of light weight, but
not the case, as Our Precious Lord weighs more than overall Universes.
The logic is the following: Our Precious Husband supports just a particle of the Universes with His Aishwarya, so His weight is...yes, Ananta (as in reality Our Precious Husband holds the innumerable number of the Universes simaltenously).
That's why Kamsa was slain in very unordinary way:
"Shree Brahma-Purana" (Chapter 85 in Motilal English Edition and Chapter 193 in Gretil version):
"When Kamsa was commanding thus Lord Shree Krishna laughed. With great speed He jumped on to the couch and seized Kamsa.
When He caught hold of his hair his crown dropped down. Lord Shree Krishna felled Kamsa on the ground and Himself fell over him.
Kamsa, son of Ugrasena, was deprived of his vital breath as Lord Shree Krishna with
his enormous weight fell on him.
Being The Support of the entire universe Lord Shree Krishna had that enormous weight.
Catching hold of the hair of the dead Kamsa, Lord Shree Krishna of Great Strength (MahaBala) dragged the body of Kamsa to the middle of the stage. It was itself very great and weighty. Further it was dragged.
Thus Kamsas's body was disfigured due to the speed activity of The Noble Lord Shree Krishna".
