If you will allow a bit of "clever" (*ahem) rule lawyering, I present:
A pinned Catapult!
Vid:
https://youtu.be/b2GrCiziMRs
Now, besiege claims I am using 18 blocks; But I say, "nay! only six blocks I see, 8 if you insist on including braces as 'blocks'... "
Bonus video!!!! legit 10 block...