raise "too"

[asofel]

This discussion came up last night at a home game, and I was hoping someone would know a little bit about the matter.

We were playing a .50/1 NL cash game. Its a friendly game, but we all try to play well and be respectful of what the rules should be. At one point I was in a conversation and was talking about something, I look down and see AA, and mid sentence: "so that's that....and I raise, too."

My friend was saying that I should be locked into raising $2. I'm unclear as to how this would work in a casino, if it was a limit game would it be different, and so on. If anyone has any thoughts on this, I can definitely see how its announcing a raise of $2, just wasn't sure if it'd be different in limit or what...

thanks