Popcorn is a favorite treat of both Ralph and Scooter. Yesterday morning, I made them some fresh popcorn in the air-popper, and Scooter was making the popping sound right along with the popcorn. Greys seem to want to imitate any sound they think is interesting. Ralph is only interested in the end product of popping corn and doesn't care how it sounds, as long as he gets some as soon as it's ready.
I find it amazing how they can so accurately mimic sounds! Ralph, no doubt, finds it pointless to bother with the effort (seeing as he already resides with an on-call 'mimicker'). He's such a class act.
Scooter does pick up on all sorts of sounds and enjoys imitating them (accurately). Ralph is more choosy about which sounds to mimic-- mostly, it's the creaky cupboard door. He's one up on Scooter, since he can already say the word popcorn, but it won't be surprising if Scooter learns it too. They both sure know what it means.