" , " BITER ! ! ! " , and " GET HELP ! ! ! ! ! " I promise I will meditate more closely upon the causal relationship between going dumpster diving on Sunday afternoon and projectile vomiting Monday , and being brought to the Evil Place Where They Stick Things Up My Butt on Tuesday evening .
Question: What is the most likely reason that the writer get sick on Monday ?
The answer to the above question:


Their immune system was n't used to the germs from the dumpster .