He doesn't look up immediately. His forearm armour paneling is on the table alone with a load of wires and he's trying to concentrate on not completely screwing up his finger pistons. Something that would be far easier if he had the right equipment but whatever. Beggars and ex-Primes can't be choosers.

It takes a good minute or two before he acknowledges Optimus' presence.

"Do you need something lifted?" he asks flatly. Why else would Optimus come after him? He's not entirely aware of the amount of time that's passed and that it would be time for rehab again.