How on earth do I crew a non-vehicle?
The simplest method of accomplishing this probably involves using a Mizzium Transreliquat. Say you control a Mizzium Transreliquat, a Sol Ring, a Smuggler&#39;s Copter, and a Grizzly Bears. Then you can get the situation the bulletin is referring to by doing the following: 


Activate and resolve the Mizzium Transreliquat's second ability targeting the Copter.
Activate the copy's Crew ability. 
While that is on the stack, activate and resolve the Mizzium Transreliquat ability again targeting Sol Ring.
Let the Crew ability resolve, animating a copy of a Sol Ring.