Barricade notes the tapping, chuckling and giving the panel a light wag, the panels closest to it flared to keep out of range of Optimus's fingers.

"What can I say? We're built for offense and defense even if we don't have combat training~" Which is, admittedly, more of an advantage when your life is not medical work and fancy parties.

"Promise I've been keeping them well away from injuring you."