I've never experienced full loss of control before. I've been so desperate my breath has been ragged and I can't stand up straight as I rush to the tub and let go. But in those situations it's more of a surrendering to the moment. A giving up and letting it happen rather than my body taking over and making me pee my pants.
I've been thinking about going out someplace further away and leaving at closing time (late) and then taking the bus home. Being forced to wait in my seat trying not to give anything away.
Then getting off the bus early so I have to walk a longer distance home. Walking down the quiet streets with my hand in my crotch holding back the flood. Trying to get home or to my safe darkened street (the one with no street lights) so I can safely release.
Will I make it that far? Will I miscalculate and leak on the bus or during my walk? Maybe someone will see my desperation and I won't be able to hide my need exposing the fact that I'm on the verge of helplessly flooding myself.
LOL I probably won't do any of that. Get impatient and go home and leak there.

Actually calculating need can be tough. Sometimes I drink only a little before frantic other times I feel like I'm waiting forever.
Edit: I got so caught up in the fantasy I forgot to explain why it's strange for me to want to be spotted or embarrassed. That normally isn't my side of the fetish. I was very much into pee playing safely or watching others losing control.
I mean I still am but in some of the stories I've read, where the guy can't pee yet and is on the verge of having a hot accident down his legs (with a manager or teacher or someone watching him) I find myself imagining myself in the position rather than watching it. Being desperate to last out and not soak myself in front of them, embarrassed that my need got the better of me. Oh no it's too late, I couldn't hold it. The flood of hot urine swimming around my balls is almost as hot as my embarrassment on my face.
I've been getting into male desperation and wetting these last few years (has it been years already, where does the time go?) seeking it out in equal parts to female desperation. I find it more specific and focused but also enjoy it more in some ways.
I guess fetishes can grow and evolve over time.