All you need to stop a brain is a bullet.
"Alright where is the beast so that I can size it up?"
"That's the thing...you see that mountain range over there?"
"Yeah, the twin spires, what of it?"
"Well that's the beast"
"Bah, dere be no such thing as no 'peripheral beast'. How can their exist a creature you canno' even look at?"
Torax Shieldbreaker, Dwarven explorer
Rabbit-leonine like grass dwellers, for flavour
Bag on a Stick
Very simple gag but a great one, since it can be used multiple times over, even in the same adventure. Great for tribal natives gone restless and humanoids, but anyone can have set this up. Just what the header says, a simple bag over a stick stuck in the ground or floor.
As GM you can place the bag on a stick anywhere, in a floor crack the heroes have passed before, outdoors in a clearing or path, or at the edge of the PCs' encampment the following morning, what have you. Place anything on the stick - a coiled yellow viper angered by the bag removal, mini crossbow w/poison, transdermal hallucinatory drug dusted on the bag, yellow mold colony, an NPC ally's head, a weapon, scroll tube or satchel, what have you.
The idea is to build tension and/or stall for time/distract the party. Provided it's used properly, you'll be amazed at how paranoid players will get from this simple gag.