I wouldn't worry about just yet. Leave him for for 5 days and try again.
Once upon a time, a woman was picking up firewood. She came upon a poisonous snake frozen in the snow. She took the snake home and nursed it back to health. One day the snake bit her on the cheek. As she lay dying, she asked the snake, "Why have you done this to me?" And the snake answered, "Look, bitch, you knew I was a snake."
Before buying a royal python containing the spider gene, give this short video a watch. It may well change your mind http://youtu.be/JfTbiZ_dzVM