How risky is it to allude to Harry Potter in my essay?

Applying to College Common and Coalition Application
1

<p>My friend and I used to make 'magic potions' as a kid and I'm writing about that. Can I call a potion "worthy of Severus Snape"?</p>

2

<p>What’s more dangerous than the content of your essays is your lack of confidence. Jesus Christ, go for it.</p>