Wayne's impersonation:

My favorite one to do is Andy Rooney. Which reminds me: Did you ever notice how hard it is to open a CD case? I'll stick to my Glenn Miller records on vinyl, if you don't mind. [Editor's note: I have been told my best impersonation is actually Michael McDonald.]

Amy's animal:

cat. cat. catcatcatcatcatcat [pick up, hurl]
.
.
.
.
.
cat?

Rick's animal:

A dog (most likely a Yellow Lab crossed with a Saint Bernard)

Matt's animal:

The turducken

Henry's animal:

The Awesomenator 2000