This is very good, but not amongst your best of jokes.
The thing with rope should have existing in the second panel also makes sense, and I agree with that viewer.
I liked the gag of this one, but it bugs me how you see most of George's body in the second panel and he doesn't have any rope around him. According to the third panel, he should have had some rope tied to the white fur on his body. Minor detail, but it's one I picked up on fairly quickly.
Yeah, that's true. I didn't want to ruin the joke or do super close-ups, though... Someone on DeviantArt interpreted this way: "The kidnappers must have tied them up RIGHT after he said that xD" ...I'll go with that :)