I stay high/or stoned for about the same time, 2 hours. And it peaks just as i put the joint out. I always get up, and steady myself. I love the feeling. Reminds me of when i smoked for the first time. I'm lucky in that respect, the tolerance issue doesnt make it harder for me to get high on the same amount, it just doesnt last as long as it used to [3-5 hours] but i just smoke every hour and a half to keep my headaches at bay, and to stop me craving the cigs i quit. My lungs feel bigger and better now i've quit them, pure weed for me is as good for my lungs as natural air. I havnt even wheezed for months. And i've got more energy. Fucking brilliant to be honest, weed FTW>