I was careless for some time years ago, the 1st, 2nd and 3rd gen Google phones. The Huawei Google phone was the slipperiest with it's full metal body.
However I then changed jobs and the work trousers have pockets that when you sit down the phone slips out, usually it just sits on the seat, but when jumping out the work van on jobs I found that the phone went flying. I also had issues while working on cars laying on the floor the phone would keep fallout of pockets regardless of what I was wearing.
The phone always goes in my left pocket.
Lucky none of my phones ever smashed, but they did start getting beat up, So I ended up getting a case for all my phones since.
I do find them annoying though, no matter how slim the case you get is the phone always feels significantly thinner without it.