Waves Of Misfortune

"Neil, I seemed to see something inside my tent. Could you check it out for me?" Adeline was afraid of snakes, insects, and mice. "Sure, Miss Simpson." Neil took a branch and probed the inside of the tent.  "Woah!" Adeline was startled by Neil's shout. Then, she saw a small snake twisted itself around Neil's arm.  "Ah... " "You are so brave. How did you manage to catch it?" Adeline was horrified and staggered a few steps back.  Neil scratched the back of his head and said, "I grew up at the countryside so this is nothing for me, in fact, it's quite common." Looking at the snake, Adeline's whole body shivered. "Neil, what should we do with it?" Adeline asked uncomfortably.  Neil picked up a big rock. He aimed it at the snake and smashed the snake with the rock. After few hits, the snack was dead. Neil murmured while looking at the snake on the ground, "Well, this is weird. How did the snake manage to slither in when we had sprinkled sulphur powder all around the tent?" Neil thought that