I got held at the (utterly empty otherwise) border for 40 minutes. They went through my whole backpack (just wet stinking climbing clothing equipment), did some obscure exercises like taking out all my cash & cards from wallet, counting it, putting into envelope and then back to me and so on.
I was super thirsty, when I asked them for a cup of water they repeatedly ignored it. They yelled at me and were generally super unfriendly, treating me like a criminal. I cross normally (non-covid times) that border several times a week, never anything similar. You can't do much, they have all the power, and they make you feel it.
This is Swiss, don't hold your breath for other european places. There are sane normal policemen, just like everywhere, but there are also fucked up power tripping assholes. They just can be more trigger-happy in places like US.