Personally I haven't had any bad, I'm gonna bust the windows out ya car break ups. However, in my experiences you don't (or at least I didn't) go right back into friendship mode. Usually someone (me ;.;) always ends up with left-over feelings that will get in the way and send horrible mixed signals. Seriously, regardless of how you break up, if there are any remnants of any emotional attachment they will flare up and eat at you away and give you delusional ideas.Thus normally, it takes a few months of polite or minimal exposure/contact with the ex to start getting over a person (or at least for me) and allowing you to start connecting on a genuine friendship. Like I said though, this is from my experiences, and perhaps your break up was not a one-sided one and maybe neither of you have any left over feelings. I know not every person or break up is the same, but that's just what I've observed. Good luck with that.