''It shows his hard work. When hard work is not rewarded you react. He was a bit childish at times but he will learn from experience,'' Prabhakar said at the sidelines of India's practice session ahead of the first Test against Pakistan here on Thursday.
Prabhakar had a word of advice for the Kerala pacer to control aggression for his own benefit though refusing to term it went beyond limits.
''He has to control his aggression. If uncontrolled it will only effect his performance though I don't think it was beyond limits,'' said Prabhakar, who was recently appointed Delhi bowling coach.
Prabhakar, who served out a five-year ban by BCCI for his alleged involvement in match fixing scandal, said among the Indian pacers R P Singh was bowling the best at present.
On the pitch which has more grass than normally seen at Feroz Shah Kotla, he said it will have even bounce and swing in the morning and evening.
Prabhakar, though, said he was not sure whether the grass will remain on the pitch tomorrow.
''I do not know whether the the grass on the pitch will be cut out tomorrow. But if it remains like this, there will be even bounce and swing in the morning and evening and the bowlers who bowled with accurate line and length will have upper hand,'' said 44-year-old Prabhakar, who played 39 Tests ans 130 ODIs for India between 1984 and 1996.