First, I'll tell you that I didn't want drugs in labor. It wasn't worth the risk to me or my baby. But, I understand that many women either think the risk isn't significant enough or that women don't actually understand the risks. As a doula, I support a woman's choice to get one when they feel they need it. My knowledge is from research, and from my training as a midwife's assistant and a doula, it is not personal experience. But please know that I am very educated on the matter and my statements come from that education, not from an anti-epidural view.
MOST women cannot walk after getting an epidural. Your case is actually rare. There are two reasons this happens. 1) There is too much medication given to feel anything, and 2) the doctor doesn't want to take any chances. An "epidural light" can be given which can, sometimes leave enough feeling to walk short distances, like to the bathroom, however, many hospitals don't even have this choice, many automatically order a urine catheter so you don't have any reason to get out of bed. However, there is more risk with a "walking epidural" because it's done differently, so many hospitals don't even offer them any more.
No matter your experience, you need to understand that MOST women with epidurals ARE in fact restricted from walking as soon as that needle is placed until at least a couple hours after birth when they have worn off. Many don't feel any pressure and that is why so many end up with bad perineal tears - a lack of pain means they can't feel that they should stop pushing and let the tissue stretch naturally (hence your need for stitching).
Please realize that you are the exception to the rule, not the norm. Telling your friend that many women can walk with epidurals is a fallacy. It worked for you and that's great, but please don't lead her on to think they are all like that or that they are without risk. She should expect that she won't be able to be on her feet at all, and she should ask her own doctor what his/her practices are and what the hospital offers.