Michelangelo: What's up, brah? Oh, you think you can handle this, Huh? I'm a snapping turtle fool!
Donatello: Allow me to be the badass for once.
April: You're ninja...mutant...turtle...teenagers?
Donatello: When you put it like that it sounds ridiculous.
Leonardo: Let's rock 'n' roll, boys.
Suggested correction: That isn't a plot hole. Vernon assumed April was the person calling him and was correct. People do this all the time in real life.
BaconIsMyBFF