Haha, aint it great? I've had it happen and heard/seen others that had it happen too. It'll level out if he keeps up with smoking.

Related note: I was with a girl yesterday who took her first hit also, & she went so pale and almost shut down. She had to lay down and pass out. Was groggy for about 4 hrs after she woke up (9 hrs later), and was really freaked out. Never stopped me I was worried, but she's laughing about it now so I guess it's all good.