[Hm.] And I saw...the Krang ship. [He still hasn't told the rest of their family what he did. Michael has been sworn (and bribed) to silence, but it's not going to last much longer. Especially not if he's seeing things about it.] I thought I was stuck inside of it. I couldn't see anything, not even the junkyard.

It happened at the same time. Some kind of mystic auditory hallucination that plays off our own personal fears? As you said, sounds like Hypno. But he usually doesn't do something like this just for fun, so he must have an objective.