Most obvious his "Ducky" in LBT 4 and (a little less distinct but still clear) his "Mama" in LBT 8 when he submerges in the icy water.
By the way in the German version of the LBT 7 song "Good inside" Spike utters two words whose English counterparts are uttered by Petrie.
There are two of the five main characters who show a rather inconstant dimension of acrophobia (fear of heights) throughout the series or even throughout a movie. Name the two characters and give an example for each of them.
