Drift listens to Minimus talk attentively, leaning forward with an intent look on his face -- and then the further Minimus goes on, the wider his optics get, and Drift's expression becomes increasingly crestfallen. It's not so much Magnus' identity disappoints him -- he's just starting to get weary of all these earth-shattering surprises. He gives Minimus a long, helpless look and lets his face fall heavily into his hand.

"Why wouldn't anyone tell me that?"