In college I was about halfway through my latest purchase, and for whatever reason I looked at it closely.. saw a few white patches on it, had no magnifying glass or anything but had a scanner(printer/scanner), I put the weed in there and what do ya know... looked like a fucking horror movie, I google image'd an approximation for you guys..
Under the scanner it looked exactly like this(much smaller and x1000 for spore count), I'll look for the pics I took later tonight, will post if I still have them..
The worst thing was I had that weed in a mason jar with hash, and the spores spread ONTO the hash(read: fuck me.). I call up the person and tell them my weeds got mold growing on it, they offered a full refund, appreciating the great customer service, I didn't take the offer.. So that left me with a bag of moldy weed and a block of spotted hash..
After debating cancer and/or a farm of mold in my lungs, I ended up smoking the lot of it, minus the exterior shell of the hash to which I scrapped off with a knife.
*tear*, college.
Cliffnotes : Smoked moldy weed years ago, still alive, get 'er done dsiomtw.