My twins were born around 3-4 minutes apart. Twin A came out flying, head first. This was 2 minutes after they gave me the epidural. At first I didn't want the epi but my OB convinced me that it would be better (this all happenend during transition) because Twin B was transverse, and she'd have to perform a very painful and risky procedure, so I agreed.
So they gave me the epi and immediately afterwards, my first sweet girl was born. They were born at term (37 weeks) but she had IUGR and had the weight of a 34w baby. So she was being taken care of by a team of peds while I was birthing Twin B. Or I should rather say, while the OB was delivering Twin B. Right after the first birth, she put her hands up there (and the epi hand't started working yet!!!!) and grabbed the foot, turned her breech and delivered her feet first.