In LBT VI, fear of heights is shown by Spike when crossing the rocky pinnacles.
Petrie: You can do it! Just no look down!
Spike: (begins to walk off cliff edge with eyes closed)
Petrie: (pulls on Spike's tail) Spike, no! No look down, but look at something!
Spike: (opens eyes and quickly returns to safe ground, sitting on Petrie)
Petrie: Not bad for first try!
Spike later crosses the pinnacles in record time. His motivation proves to be a tasty plant.
Later, we see Ducky crossing the log.
Ducky: (looks down and screams)
Petrie: No worry! You swimmer, right?
Ducky: Mmm-hmm.
Petrie: If you fall, there is skinny little river way down there that you might land in!
Ducky: (sarcastically) Oh, thank you. I feel so much better now.
