(Note: This is reaaally off topic.)
I found where John's signature comes from. My sister checked out Bolt and we were all watching. Then Rhino the Hamster said something about how the impossible can be possible if you're awesome .
I'll watch it again tomorrow.
[Edit] Found it...
Rhino They need a hero to tell them that sometimes the impossible can become possible if you're awesome!
(For anyone who hasn't read BuddhaChu's comment yet.)
[Edit2]Got bored and found the clip on youtube. http://www.tubechop.com/watch/43306