I know whenever I sit down and smoke, I feel like I am so much higher. After a few hits I just close my eyes and feel my head float around. If I am standing up smoking a blunt or something, its hard to feel the high.

Smoking on an empty stomach helps too. Try smoking on a completely empty stomach, you'll be ripped!

For you, it could have just been that you were more relaxed in such a desireable enviornment for you, which allowed you to get higher.