You'd brought Blitzwing along with you to Shockwave's lab, thinking nothing that bad could go wrong.

Let's just say this wasn't good.

You were walking around, Blitzwing following behind you. You heard a crash and sound of glass breaking behind you, the mech had probably knocked a vial down, so you turned to scold him. But instead of seeing Blitzwing, you saw a cat with Blitzwing's colour scheme, its fur fluffed up in surprise, a weird liquid on its front paws and a smashed vial, Blitzwing nowhere to be seen.

Then you realised.

The cat was Blitzwing.