Yes, but Gohan thought the fight was over, Goku warp kamehameha wouldn't be thinking fight was over. Also Gohan isn't Goku, and Goku is the one who is always getting hurt or whatever by guard downs. Majin Vegeta, Sorbet, Freeza in the newest episode, a rock to the head by Krillin. Gohan is the opposite, he goes Vegeta's route, and gets overly cocky when he is stronger than someone. The difference is, Vegeta lets them get stronger, and against Gohan they just pull out something that he can't stop and get away from him and then end up more powerful.
__________________ If you try something stupid, and it works it ain't stupid.
The planet is made up of mostly rock. So a ki energy that hits the earth will break it apart causing a chain reaction. Not the same with some types of metals. If ki was very lethal, trunks sword would have incinerated a long time ago.