When I was pregnant with K, starting at about 32 weeks she started amusing herself by alternating between slouching down in my pelvis in transverse position and stretching herself up into breech, jamming her hard little head into my ribs in the process.
At a mere 29 weeks, Wulfrith has discovered the same trick of jamming his head into my ribs. I guess this is one of the milestones you get to experience when you have babies that don't care to go head down. I suppose I can take comfort in the fact that I may never know what it feels like to get kicked in the ribs.
It's very cute of you to try and imitate your sister, sweetheart, but there's no need to be precocious.