On the topic of failing bench press, actually happened to me last week.
I'm not strong enough to be using scary amounts of weight, and was able to at least slow the descent. So it was mostly just slightly uncomfortable, and slightly embarrassing.
Bar comes down down on my chest, go to roll it forwards, toward my hips, so I can sit up and get out from under it. Unfortunately, the shithole ghetto gym I was at had a massive fucking pillar right next to the bench, so the path of the bar was blocked. Had to shimmy my body around on the bench, bar on top of me, bringing my ass to where my head was, so I could finally sit up, and get it off of me.
This was my first time actually failing a lift. I try to train pretty close to failure, under the theory that as a beginner, I probably can't reliably estimate how close I am. If I try to leave 3 reps in the tank, it'll probably be 7. So on most my movements, I try to aim for 0-1 reps away from failure. Squat/Deadlift are a bit more conservative if my form starts to break down. I would say 90℅ of the time, I manage to get the last rep out, occasionally I get halfway through and decide its better to just rack the weight at that point, but like i said, this is the first time I've actually failed, and dropped some shit.
On the bright side, it looks like confirmation that I've been getting as close to failure as I thought, so its cool to know I haven't been training like a pussy this whole time