All right, here's my shot:
If our intimidating evil headmaster hadn't specified "one page," this would be a nice two-page comic-size spread. As it is, it'll have to be magazine trim.
A monkey is sauntering through the jungle without a care in the world, when he happens upon a banana on a large rock. The monkey spots the banana, then tentatively checks it out. After a bit of back,-and-forth indecision, he grabs the banana and sits down on the rock to eat it. At this point, the rock sprouts a mouth and eats the monkey, banana and all, resetting the trap with a fresh banana.
Full Script Without Camera Direction
A monkey is walking through the jungle without a care in the world.
The monkey walks up on a banana sitting on a large rock.
The monkey looks hard at the banana, obviously thinking it over.
The monkey starts toward the banana.
The monkey walks away from the banana, looking over its shoulder, clearly wanting the banana, but unsure if he should take it.
The monkey sneaks back toward the banana.
The monkey reaches out to take the banana.
The monkey grabs the banana.
The monkey seats himself on the rock, a look of excitement on his face.
The monkey starts to eat the banana.
The rock reveals a mouth at the top, gulping the monkey down.
The rock spits something into the air.
A new banana lands on top of the rock.
Full Script With Camera Direction
PANEL 1 (TOP TIER, 2/3 WIDTH OF PAGE)
A medium shot, showing a monkey centered in the panel, walking through the jungle without a care in the world.
PANEL 2 (TOP TIER, RIGHT)
A medium shot of a banana sitting on a large rock to the right of the panel, with just the forward foot of the walking monkey visible to the left.
PANEL 3 (SECOND TIER, LEFT)
The monkey is now fully visible on the left of the shot (no longer walking), with the banana/rock on the right. The monkey looks a bit surprised and excited.
PANEL 4 (SECOND TIER, MIDDLE)
Same shot as PANEL 3. The monkey leans toward the banana, his hand starting to reach for it, a nervous look on his face.
PANEL 5 (SECOND TIER, RIGHT)
Same shot as PANEL 3., except the monkey's body is facing left, walking away, yet he is looking back over his shoulder. His face shows a longing for the banana, even as he walks away.
PANEL 6 (THIRD TIER, LEFT)
Same shot as PANEL 3. The monkey's head is partially visible on the left border of the panel, as he leans in to eye the banana with a suspicious look on his face.
PANEL 7 (THIRD TIER, MIDDLE)
Same shot as PANEL 3. The monkey is now fully visible in the panel (still on the left), with a hand outstretched toward the banana, fingers grasping and legs obviously carrying him toward the rock in a tip-toe manner.
PANEL 8 (THIRD TIER, RIGHT)
Same shot as PANEL 3. The monkey is now just to the left of the rock, grabbing the banana with an excited look on his face.
PANEL 9 (FOURTH TIER, LEFT)
Same shot as PANEL 3. The monkey seats himself on the rock, the look of excitement still on his face, starting to peel the banana.
PANEL 10 (FOURTH TIER, MIDDLE)
Same shot as PANEL 3. The monkey starts to eat the banana with a contented look, still seated on the rock. The rock, for its part, has just a couple of movement lines around the bottom, indicating something is happening.
PANEL 11 (FOURTH TIER, RIGHT)
Same shot as PANEL 3. The rock is now split at the top, gulping the monkey down, with only the monkey's face and the hand holding the banana still visible. The monkey, as you can imagine, looks scared out of his tiny monkey mind.
PANEL 12 (FIFTH TIER, LEFT)
Same shot as PANEL 3. The monkey is gone, and zip lines indicate that the rock has shot something up into the air off-panel. The opening on the rock is closing.
PANEL 13 (FIFTH TIER, 2/3 WIDTH RIGHT)
The rock is centered in the panel. A fresh, unpeeled banana lands on the rock, falling from the top of the panel onto the rock, reloading the trap.