From From Nazis to Nasa: The Life of Wernher von Braun by Bob Ward:

'Von Braun's avalanche of fan mail ran the full spectrum. One woman wrote, "I only have one question before I sign off: is it possible for one to attain sexual pleasure from sending up rockets?'... One of the strangest letters, an ominous one, came from a correspondent in Germany claiming to represent a "world-famous rock'n'roll group". All that the band wanted was for von Braun to secretly bring to America a pretty, 14-year-old German girl whom they had marked for stardom as a singer. They would pay him well for his trouble but, if he didn't cooperate, it would be "death for you and your wife".'

Also:

'"It was my suggestion,' Dr Generales recalled years later, "that before he attempted a lunar flight, it might be worthwhile to try it with mice as 'passengers' first. Wernher agreed it was a good idea. And so we found ourselves spinning white mice on a specially mounted bicycle in Wernher's rooms." But disaster struck some of the experiments, as the home-made centrifuge, designed to simulate rocket take-offs, spun faster and faster, the blood of "a number of these unfortunate beasts" was flung against the ceiling of the room – with unpleasantly messy results, as von Braun later reported. "Our... inquisitions were summarily interrupted by my landlady's violent objections to a ring of mouse-blood upon the walls of my otherwise neat Swiss room." Medical student Generales dissected the mice and reported to his space-minded friend that the high acceleration had caused cerebral haemorrhages in the subject animals.'