You will have to define "life threatening" for me here because I have trouble with this term in this context. If I recall from podcasts and talking to him myself, Tim has said that these things have had more than ample opportunity to kill the crap out of him and those with him and haven't done it yet(obviously), and if you ask me there was zero opportunity for the bigfoot to sustain injury in the process more than likely. If I recall correctly he saw one on night vision taking a swipe at "Bear", which sounds menacing enough until you figure out that it could have hit him easily if it wanted to, If I remember right it was just a half butted swipe, more of a gesture telling them to bug off. You have to realize that they don't speak English, so the only way they can convey themselves is through gestures and the sort, problem is something as big and fierce as they are could just burp and melt most people's heart through their bowels.....Tbh I have only heard of people actually coming into physical contact with a bigfoot in anyway only a couple of times in the past 50-60 years, that out of about 10k stories I have been through, both related to me directly and indirectly.
I suppose my experiences could have been "life threatening" if it tripped and fell on me (which seems to be how most people would have interpreted the encounter >.<), being as how it was about 4 feet from me, it had every opportunity to harass or kill me for two nights but never even touched me. The speed, strength, and just outright stupidly stealthyness of these things(I have experienced all 3 in a short and amazing time, and it made my jaw drop) makes me think it is pretty dang stupid to be afraid one is going to just kill you because if it is, you are toast and there is nothing you can do to stop it. I don't even think a good gun would even HELP if you were alone or just with another person.
I remember Robert Morgan, a old time researcher of 50+years, talking about the only time he ever thought one was going to kill him. He and his group had managed to figure out where a family was bedding down in the PNW after a long time in the area and decided to go to the area to see if they could collect evidence. Once they got to a point where the nest apparently was (It was like a mountain of brush, I remember a guy who got the hell hounded out of him a few months ago from around Roanoke,VA who had a thread calling them 'trolls' talking about this sort of nest, funny thing is I believed the guy but everyone ran him off as fast as they could, that is the bigfoot community for you, mindless negativity) something big just jumped up a ways off and started booking it towards them with apparently near supernatural speed. If I recall it was a way off but closing maddeningly fast, they had some group members spotting for them in case something like this happened, and they were the ones who caught it first. Robert noted that the thing wasn't heading directly for them, but was deliberately headed for where their exit path was, they would be trapped between it and the brush but got the heck out of dodge! Robert seemed to think it was a big daddy and his babies were staying in that brush, it was a horrible ignorant idea. Besides doing disrespectful BS like what that group pulled in that situation, I would say a deadly bigfoot encounter just isn't going to be a issue for you out and about looking for them.