Here's a tip for all of you amateur drug smugglers out there: If you're going to attempt to sneak a bag of marijuana through airport security, it might not be the best idea to conceal it inside a full-size replica of a deadly explosive device. While TSA agents aren't tasked with sniffing out drugs, they have a knack for spotting items on the X-ray screen that are the exact shape and size of a hand grenade.
A dazed and confused Denver passenger came to this decidedly un-groovy realization when TSA officers removed a novelty hand grenade from his bag and discovered that it was stuffed with, in the immortal words of a TSA blog writer, "a green leafy substance" [source: Burns]. Two strikes for our intrepid traveler. Next time, cram it in your child's Barney doll.