There are two Talk bubble clips that share the name "Yells". The duration of the clips changes depending on the amount of text added.
Yells[]
The first Yells clip is available for everyone to use in the Movie Maker. It is used when you want one of the characters to shout very loudly.
Yells[]
The second Yells clip is exclusive to VIP members in the Movie Maker. It is used when you want one of the characters to freak out over something.