Bomb? (Encounter idea)
Here's one for you DM's that want a real mugging with a fake bomb. The players are wandering around the world, when they encounter a strange little goblin. The goblin will wander up to the party & pull out a ticking device. The goblin will state that "This bomb will explode if you don't give me your thingies" If the play notice the obvious (ie the goblin would also explode) & or do a check on the bomb (if they check they will notice that it's just an odd looking clock), the goblin will start to get nervous but will double down on there threat. If the players double down on calling there crap, the goblin will drop the 'bomb' & run away.