Looking at Luke's hand, where he is pictured with R2 there seems to be something burning off screen to the left? Maybe he's been in a struggle of some kind and the synth flesh got damaged or something. A stretch, but... yeah. Maybe.
It's a long road that has no turning - It's never too late to mend.
The darkest hour is before the dawn, and even this war must end.
Pan Galactic Gargle Blaster - Widely considered the galaxy's best drink, the effects of which are like having your brains smashed out by a slice of lemon wrapped around a large gold brick.
~\\*.. The Real McCoy ..*//~