The clown uni-cyclist is a nugget indeed... It is no coincidence that Hugh Syme chose that exact stock photo for the album cover...
there are 16 spokes on the unicycle wheel... and 10 folds in the clown's pants.
16/2 = 8
10/2 = 5
5 and 8
Oh, and the plane wing,
There are 10 lines on it, 10/2 = 5
and 8 little studs coming off the top, and left most side..
5 and 8...
Again, this is no coincidence.