I think I know what your talking about. First off, I don't EVER put tobacco with weed, thats just stupid. But, I was once with this kid who had a nice bong, and packed some dank weed with some Pipe Tobacco. He was like 'just try it, take a huge rip'. So I was like 'fuck it' and hit the shit. I got an unbelievable light-headed feeling/weed high off one hit, I was gone. I like phased out for a second. So, ya, its def worth a try.