I can't rev engine when idling
 

Hi,

I have 2013 camry hybrid. I can't rev the engine when idling in park mode. Even if i floor the pedal (when engine is running) engine responds very slow its like dead. But when i drive its normal and engine responds as it should be as i press gas pedal. Why i can't rev on idling in park mode. Is it by design ? I never had hybrid vehicle. i am old school guy who love to rev engine before moving

Thanks for answers.