I broke it down and found out it has something to do with this part
MOUTH1 scales to 0.094 0.094 THEN pause for 0.07 AND overlay MOUTH4 clear THEN overlay MOUTH3 create AND overlay MOUTH3 AND overlay MOUTH1 moves to layer 2 AND overlay MOUTH1 opacity 1 in 0 THEN overlay MOUTH3 shifts to 48 290 in zone 1 AND overlay MOUTH3 scales to 0.081 0.081 AND overlay MOUTH3 moves to layer 2 AND overlay MOUTH3 opacity 1 in 0 THEN pause for 0.07 AND overlay MOUTH1 clear THEN overlay MOUTH4 create AND overlay MOUTH4 shifts to 47 295 in zone 1 AND overlay MOUTH4 scales to 0.081 0.081 AND overlay MOUTH4 moves to layer 2 AND overlay MOUTH4 opacity 1 in 0 THEN pause for 0.07 AND overlay MOUTH3 clear THEN overlay MOUTH5 create AND overlay MOUTH5 shifts to 47 295 in zone 1 AND overlay MOUTH5 scales to 0.081 0.081 AND overlay MOUTH5 moves to layer 2 AND overlay MOUTH5 opacity 1 in 0 THEN pause for 0.07 AND overlay MOUTH4 clear THEN overlay MOUTH4 create