0:53 (Heavy) "AAAAGHGJASAPSDO... I'm still alive!" (Soldier) "AAAAAAAAAAAAAAAAAAAUGH!!!" (Heavy) "*imitates Soldier and flies away*" (Soldier) "Hmm... that was pretty good."
So this explains how the RED Spy had the Soldier's duck, but realized it was a very powerful weapon. He kindly hands it back to Soldier, who is happy to have it back. He then tries to carefully transport the dangerous weapon back to his stash of prized possessions. Scout spectates and denies that Soldier cannot break the law of gravity, however, he does. When Soldier returns to his possessions, he notices something's missing. He summons his Heavy and he cheers him up. >_