Doubting my sleep paralysis?

[Stara]

I'm not sure that's what you call it, but that's my main problem when I'm actually lucid (which I rarely am). I sleepwalk and sleeptalk very easy during non-lucid dreams, so why couldn't I during lucid ones? And with the more crazy stuff like running super fast and jumping off buildings, I simply don't trust myself enough to take the risk. This is why when I get lucid, I first resolve to not do anything crazy, which turns into 'not do anything fun', which ends with me willingly losing lucidity so I can at least enjoy the dream. >< Help?