Thundercracker lets go easily enough, but he gives Kagerou a flat look.  "Don't what?  Don't keep you from walking into me, or don't keep you from collapsing to your aft in exhaustion?"  He keeps the irritation from his voice as much as possible.  He's not in the mood for a fight, and he can guess the comment was more reactionary than anything, even for as calm as it was. 

  He studies the sparkling.  "Whatever you're trying to prove, running yourself to ground in the attempt isn't going to do whoever you're trying to help much good."

  Why is he bothering?  The sparkling's already pushed him away once.  And if he had to hazard a guess, the mech's even more upset this time than he was then.  But . . . he's one of McCrane's.  That means a lot to the Seeker.  If only for his friend's sake, he has to try.

  "Look . . . whatever you're doing . . . let me help?   Two people flying search patterns can cover more ground.  And if we stagger, you can get more rest than you are now while the search is still going on."

  Kagerou was a member of the police force too, which meant if Thundercracker helped, he'd still technically be doing his job.  Especially since he had a suspicion they'd been looking for the same mech the whole time already.