Over the top bouncing around the place with excitement definitely sounds like a BPD trait to me. Everyone can do that but I think BPD tends to be a lot more often. It's been a constant battle my entire life because it leads to the opposite. What goes up must come down. As you know BPD can have rapid cycling. Lot of times I get mixed episodes of both simultaneously. Ugg it's such a destructive disorder, at least for me. When it all comes crashing down I found that having a good sleep can sometimes help.