Ezra could feel it happening, something out of his control. What it was, he wasn't sure he just knew he could feel it in the Force. He looked over at Kanan, to see if he felt it too, but if he did his Master showed no signs of it. He then looked at Ahsoka, who had joined the Ghost crew on this mission, but whatever he was feeling she wasn't. The closer they got to their destination, one that Ahsoka had only told Hera, the more oppressing the feeling got, until he felt like he could barely breathe.
He stood up, about to tell his Master that he was going to go lie down for a while, when his vision started to darken. "Kanan" he rasped, as he slipped into unconsciousness. The last thing he heard was Kanan shouting "Kid!" as Ahsoka grabbed, keeping him from hitting the hard floor of the Ghost.
Very good if you caught the song reference XD