Warning: character death
When Arthur thinks of Skip, which happens often on regular days, and always always after takeoff, he thinks of otters. Not quite a hundred, because he's sure Heaven can hold loads more otters then that. More like two. Two otters with silky fur, making chirpy little otter sounds while Skip talks to them. He imagines Skip, leaning on a fluffy bright cloud, the otters in his lap as he tells them all about the fun adventures he had on Gerti, and forgets about all the really really sad parts.
And always, when Arthur imagines Skip and a cloud and the otters, Skip always has wonderful huge white wings on his back, half open, like birds do right before they take flight.
Because, as he tells Mum and Douglas (and Dr. Carol, when she asks how he's coping), why wouldn't Martin be anything but a brilliant angel?