Top Ballista?
Compared to the "D&D is SERIOUS buisness" opinion of the books and adventures now, AD&D (both editions) was positively dripping with silliness.
Look at the AD&D PH and DMG. There are comics inside the rulebooks.
Dude, it has a death ray. When you name something "death ray", you are not being serious.A beholder is not whimsical.
For me, at least, AD&D was about the serious side of D&D. Basic D&D was where strange mad things took place - over the top kingdoms and the like.