Wether it's unmedicated, medicated, an emergency or scheduled c-section, at a birthing center, hospital, or home birth; childbirth requires a level of strength, resilience, and concentration you're hard-pressed to experience in any another situation. In other words, it's easy to get annoyed by anything that makes the superhuman thing you're currently attempting to accomplish, more difficult. If you choose to go the medicated birth route, there's likely to be more than a few infuriating things your partner will do when you're getting an epidural because, well, needles.
I've had two epidurals, and while my husband wasn't as bad as some of the other partners I've heard stories about, I was definitely hyper-aware that he was in the room and extremely uncomfortable. He has a huge needle phobia, so while he did his best to be supportive during the entire need-being-inserted-into-my-spine process, I was just waiting for him to pass out or puke or something. In fact, I think I was more worried about how he would react to the giant needle, than the actual giant needle.
A calm, distraction-free experience is absolutely necessary when someone is putting something sharp into your spine. You have to be as relaxed as possible when they place your epidural, and any muscle tension or flinching can make the process much more painful than it needs to be. So, in the interest of mamas-to-be everywhere, here is a list of things you should definitely not do while your partner is having an epidural placed, unless you want to feel the fury of a thousand suns (or whatever).