Not so much gratifying as it is anger inducing and it made my job very difficult. Once, I responded to a multiple MVA. Head on, with multiples. I was attending the driver alleged to be at fault. This one LEO kept trying to question my patient, grabbing his arm, and berating him...CERTAIN he was drunk. He wasn't. He'd had a goddamn stroke! He pulled the gentlemans NRB mask off in a last ditch attempt to question him before transport. That's when things got heated. We went toe to toe. Cops hate being commanded by medical staff but they hate being wrong worse. I had issues with that fucker until he finally lost his job for similar behavior.