What a jerk that guy was - how scary. I'm glad you got away OK. You can replace your wallet but not your life. I know its a pain getting your ID & credit cards reissued - make sure you report your wallet missing so that you are not held accountable for any charges to your credit cards.

Don't be hard on yourself for what this jerk did. This was his bad and not yours. He crossed the line and took advantage of your situation. He did the bad behavior - you were just trying to get home.

I can't believe your co-worker left without saying good bye or anything - especially since you rode with them to the bar. I would not go out for a drink with that person again. A good rule of thumb that I've always followed since college is .. "Always follow the keys". Meaning always pay attention to where the person is who has the car keys of the car that is taking you home. Just in case.