Certainly they did not pretend to be sleepy, they were sleepy; and that was a danger, for the moment they popped off, down they fell. The awful thing was that Peter thought this funny.
“There he goes again!” he would cry gleefully, as Michael suddenly dropped like a stone.
“Save him, save him!” cried Wendy, looking with horror at the cruel sea far below. Eventually Peter would dive through the air, and catch Michael just before he could strike the sea, and it was lovely the way he did it; but he always waited till the last moment, and you felt it was his cleverness that interested him and not the saving of human life. Also he was fond of variety, and the sport that engrossed him one moment would suddenly cease to engage him, so there was always the possibility that the next time you fell he would let you go.

J. M. Barrie (1860-1937) Scottish novelist and dramatist [James Matthew Barrie]

Peter and Wendy, ch. 4 “The Flight” (1911)
    (Source)

Not included in the 1928 published play, Peter Pan.