When magicians pull a rabbit out of a hat, or their sleeve, or whatever, it's implied there is way more space in there than it seems from the outside. He reaches in to pull out the hat, and the space goes on for miles. Similarly, he tries to understand the person who lies all the time in the song, but the answer isn't simple, and it's like falling down a rabbit hole.
When magicians pull a rabbit out of a hat, or their sleeve, or whatever, it's implied there is way more space in there than it seems from the outside. He reaches in to pull out the hat, and the space goes on for miles. Similarly, he tries to understand the person who lies all the time in the song, but the answer isn't simple, and it's like falling down a rabbit hole.