Sentence 1: I got a huge blister from walking for 3 miles. 
 Sentence 3: The blister swelled to epic proportions, and began to hurt 
 Sentence 4:  Unwittingly, I popped the blister 
 Sentence 5:  I found out the hard way that popped blisters are very painful 
 Given Sentence 2: I wasn't used to the exercise, so it was rough on my feet.