i said it before nadal is not the first person to do that. i recall federer doing it too a few years ago for example. in that case tho he did actually stop playing and the return wouldve been easily reachable had he tried. so it wasnt just a desperate act to try and undo a scorching returnwinner
plus i think fed was actually right about his serve being out back then..
but either way, its not against the rules technically