Not quite able not to grunt when he met the wall face-first, Megatron, despite Optimus' weight against his back keeping him up against it, and the foot on his leg keeping him partly down, still attempted to get up.

He had no leverage like this though, and even if he'd had his full normal strength, if Optimus had gotten him like this, he'd have been pretty easily controlled anyway. Walls were always your enemy, unless you had your back to it, and a weapon or two in hand to keep your opponent off.

"And the collar wasn't enough?!" He really wished to roar, but it was kept to a tightly controlled snarl as he attempted to yank the arm in Optimus' grip out of it... and of course didn't succeed at all, given the lack of strength. Trying to keep his other arm out of it wasn't very successful either, even if he did manage to slam his elbow back to hit metal... His minimal strength probably didn't make that hurt much at all, given the armour in the waist area.

At the same time, Megatron was trying his very best to ignore the feel of those hands on his wrists, as well as the ropes digging into the joints and rubbing against the cables. It sent frissons of charge at every twitch and he did not need that.