question:  What shocked Myles the most when he woke up on the beach?
context: II TOO MUCH STATIC Myles Cabot had returned to the earth to study the latest developments of modern terrestrial science for the benefit of the Cupian nation. A thunderstorm had been brewing all that evening, and just as Myles had placed himself between the coordinate axes of his machine and had gathered up the strings which ran from his control levers to within the apparatus, there had come a blinding flash. But when he had finally and fully recovered, he found himself lying on a sandy beach beside a calm and placid lake beneath a silver sky. But while he was trying to catch this vaguely elusive train of thought, his attention was diverted by the fact that, for some unaccountable reason, his belt buckle and most of the buttons which had held his clothes together were missing, so that his clothing came to pieces as he rose, and that he had to shed it rapidly in order to avoid impeding his movements. Gone was all his languor, as he seized a piece of driftwood and prepared to defend himself. As he stood thus expectant, Myles realized that his present position and condition, the surrounding scenery, and the advance of the ant-men were exactly, item for item, like the opening events of his first arrival on the planet Poros. Could it be that all his adventures in Cupia had been naught but a dream; a recurring dream, in fact? But Myles no longer possessed the wonderful electrical headset which he had contrived and built during his previous visit to that planet, so as to talk with Cupians and Formians, both of which races are earless and converse by means of radiations from their antennae. 11 He dreaded the paralyzing bite which Formians usually administer to their victims, and which he had twice experienced in the past; but, fortunately, it was not now forthcoming. The other three ants kept away from him as Doggo led him to the beached airplane, and soon they were scudding along beneath silver skies, northward as it later turned out.
output:  Enemies arrived that he believed to be dead.
options:  Enemies arrived that he believed to be dead.  He was on Venus instead of Mars.  He realized Prince Yuri was alive.  He knew he'd been dreaming.