Future Drummer?

The baby won't stop kicking. We bought this foam floor mat to put on our wood floor so it would be more comfortable for the baby to lie on, instead of just a blanket, since he's turning over now. But lately when we put him there, all he does is kick down on the floor - mainly his right foot over and over. I wonder if it's driving my downstairs neighbors crazy. Must be annoying to hear a constant thumping. I thought the foam would help absorb the sound but not so sure it does. At night in his crib, he does the same kicking and on the mattress it sounds like a bass drum. Hard to ignore. He must burn a lot of energy.

So the question has come up - we've thought about it, people have asked. Do we have another baby? Is it bad or is it selfish only to have one child? The other day at my friend's son's birthday party, there was a girl there about 12 years old who was an only child. And she mentioned that it was lonely. It is lonely unless you have peers or family the same age that you hang with often. My cousin and I grew up together and we were basically like siblings because we saw each other practically every day up until high school. In that instance, I think you would be ok as a solo child. Here in Brooklyn, I don't really know anyone with kids for my son to play with. As for family, they don't really live close by and most of the kids are much older. Not to mention, I am getting older, so the longer I wait, the more high risk a new pregnancy becomes. My one friend who is the same age as me just had her 2nd baby and it was really a difficult pregnancy: bed rest/early birth/etc. That is kind of worrisome to me. Also, we would definitely have to move - there's no space in a 1 bedroom for 2 kids, let alone the space issues we have with 1. Hmm, things to think about.