Okay, first of all, spelling mistakes: HALLUCINATING! ;D
Very unlikely. I also don't believe your story. If you knocked it out, how could it "just get back up?" And when "it knocked you out," why didn't you just get back up? Because you were knocked out? If you actually knocked the alien out, like I said before, it wouldn't just get back up because it would be knocked out.
Third, we have the technology to know that there are other solar systems, but there are tons of them. It doesn't mean that each one will have aliens.
Do you mean "Why would the foreign person be in Iowa?" or "Why would the alien be in Iowa?" Either way, why can't foreign people be in Iowa?
I don't believe that aliens exist right now, but I do believe that there MIGHT be aliens forming or going to form.... Just not now.
So, overall, I don't believe your mom's story. I'm sorry. She might have just been pulling your leg.
And wwefan0704, I don't believe your story one bit (see explanations as to why.).
♪~tk710