If I do a lot of blow, pot really only makes my head feel fuzzy for the day after and if I do blow and smoke pot together it feels like gravity and its like I'm not very high off of either.

So, yeah. Its possible.

Crappy weed doesn't really get me off, either, unless I haven't smoked for a few days, it just makes my head and eyes feel fuzzy. If I haven't smoked for a few days, it can get me off a little, and I have to smoke a lot of it for that, even.

So, yeah, its possible, twice