Possible Explanation for Bigfoot

I've watched a couple videos by UFO abductees who are asked to speak at conventions and they talk about smelling sulfer and they themselves claim these beings are not extra terrestrial necessarily but extra dimensional beings.  That they are more paranormal phenomena than scientific.   I think if there is an agenda it's to convince the world that these are physical events rather than psychological or just made up.   If you start bringing in religion then your basically saying these are not physical aliens which is what people their paying customers don't want to hear.  They want to hear that aliens are literal physical beings from Beta Reticuli.   The researchers themselves want to believe it also.  Everyone has an agenda though.  That's what christians are often afraid to look hard at the seeming contradictions of the Bible.  However if they are afraid to look at the seeming contradictions it's a result of lack of faith.  Everyone comes across evidence that contradicts their position and the right thing to do is to mention it and even go to the other side and say "Is this evidence in your favor?"  Most times though you will find that it actually isn't but if you don't face it it eats at your personal faith.   It's like Uzziah who thought he needed to protect the ark from falling.  (Not that he didn't)  He died really because he shouldn't have been anywhere near the ark and the Levites should have been involved in it.