Actually, to me, the stunt looks contrived, just note how the smaller boy protects himself from the bigger boys' impact then prepares himself to make impact with the cabinet then rolls sideways to avoid being crushed. Looks suspiciously artificial to me. And the cabinet seemed to burst on impact very easily.

I could be mistaken but I'm a cynical ol' sod these days.
If it was a contrived trick, the boys performed pretty well.

Growing Old Disgracefully