<human>: TIFU by poisoning a homeless person. Accidentally. 

You know the saying, "no good deed goes unpunished"? It's true. 

I live in Texas. We have some phenomenal tacos. And with such an abundance of taco options, sometimes you catch a desire to branch out. I was leaving a lunch at this small taco place in south Austin (I won't name names) after some delightful tacos al pastor. 

A homeless man approached. He said, "Could you please buy me a taco? I don't want money. I am a veteran and I am very hungry." Life has smiled onto me lately and I thought I could help. We went back inside and he ordered. He happened to order the exact same tacos as me. I paid, and thought nothing more of it. 

That was, until about 8 hours later when my stomach turned inside out and my intestines liquified. For the next 12 hours, I was Old Faithful, but instead of beautiful prismatic geyser water, I was a muddy river teeming with salmonella. Only through the deft nursing abilities of my lovely lady-friend (pedialyte, Soup Peddler smoothies, and ginger ale) was I able to return to a functional, yet fragile form. 

But you know who didn't have a nurse on standby? You know who didn't have reprieve from the hot summer sun? You know who didn't have money for smoothies and Canada Dry? Yah. That poor homeless man. I pray he didn't get the same vile batch of poison pork.

Can you give me the gist of the text in a nutshell?
<bot>: Ate the three little piggies in taco form. The big bad wolf blew my insides up. No saying how the homeless man who shared the meal got out alive...