weed is almost never laced. I've never heard of anyone lacing weed and selling it as straight weed. I've only once had some one get a bag that was laced, and it was because they were a moron, and they asked one of the biggest pot dealers in the west end of pittsburg if they had "the good shit". It was pretty obvious to me, and to the 4 of us who threw down for it that it was coke bud. If you think you have coke of pcp weed, and you smoke it, if you notice something very very very odd about the smoke, like it doesn't even resemble normal pot smoke, then its probaly laced, but it would be very very different