Jumping through the side of a (metal) van...
This is where I checked out. I made it through learning ninjitsu from a book (where does a rat learn to read) but the van was too much.
Now I understand this was a cartoon, but with this an outlandish of a premise they should have just skipped trying to explain it -- I give them credit for trying too many movies don't explain themselves -- but in this case it just made things worse.
It was free on Netflix