Is this a new fish that is exploring or a long time resident that just changed her habits? If she has been in there a while, I would start looking for what else has changed. That would include water quality, feeding and food type, decorations or their location, new fish added, etc. Almost any change can affect the actions of your fish but you want to check that nothing is going wrong. Sometimes the fish will tell you something is not right, at other times they really are just playing. It could be something as minor as that corner of the tank having been blocked and she just noticed it had opened up.