[ EU ] In Pokemon Zubats are annoying but laughably weak . Write a story that makes them absolutely terrifying .

The entrance of the cave was large enough to fly a small plane in. 
 Fang-like stalactites and stalagmites obscure the dark shapes of winged bodies silhouetted in dieing sunlight, giving the impression of an unholy passage into the underworld. 
 
 A middle-aged man watches the last of the zubat depart for the hunt before setting off deep into the heart of the cave. He brings no light - years of treading the path allows him to navigate it blind. 
 Besides, all the experienced harvesters knew light was a dangerous risk. The zubat could n't see, but their wing membranes could sense the heat coming off a simple flashlight. 
 
 The man enters the roosting chamber, and finds what he came for on the cave floor. Rather, it basically IS the cave floor. 
 
 Layers upon layers of zubat guano. A highly effective fertilizer that induced massive growth in plants. While farmers prized it highly, the real money was in the trainers. 
 
 Grass types who regularly ate the fertilizer could grow to proportions larger than anything seen before. The boost in combat effectiveness was so palpable that the League was in a massive dispute over whether or not to ban Z guano. 
 
 Until then, the man made himself very rich with a shovel, a large sack, and a knowledge of the territory. 
 
 ________________ 
 
 Hours passed until he noticed them. Whether they had all overslept or simply eaten their fill on the last trip, a massive number of zubats had not gone out to hunt. They had rested in the secret cracks and crannies of the cave, but now started to flutter about - agitated. 
 
 The man smelt his forearm. There was no other scent on his skin beyond the suffocating acrid stench of guano. 
 
 *Repels effect had worn off. * 
 
 One zubat starts screaming. The man knows this sound could stun a pidgey out of the sky. 
 Several others join in. A chorus that could kill a pikachu dead. 
 Now the man can no longer hear the zubats, yet his vision starts to fade. 
 
 Finally falling to his knees, his corpse joins the final resting place for all who feed the colony. 
 
 

