HINT: There are LOTS of them!
The conversation outlined below actually happened yesterday while listening to an unreleased song Zedd produced for one of the biggest superstars in music (that's all I can say right now... but it will be dropping soon, and I predict it'll be one of the biggest songs of the summer!).
Turns out, Zedd has actually fes'd up to dropping these little Easter eggs in his songs for the past 7 years or so:
I bet from this point forward when you hear a clock tick, you'll be thinking about Zedd too! :)