Playing in space is particularly difficult, Hadfield said, because
you have to press the guitar against you so that it doesn’t float away,
while also trying to move your hand up and down the fretboard...
Hadfield also said that weightlessness interfered with the muscle
memory of where his hands belonged to play a certain chord. If you want
to recreate the feeling of playing guitar in space, stand on your head
for a few hours and then try to play upside down. “You kind of have to
learn how to be a space musician,” Hadfield said.