Drop the following onto the ground under the cliff:

Round 1: Sofa
Round 2: Bed
Round 3: Pillow

Alternatively, you can put “wings” on the man. However you will have to remove it after.

Scribblenauts Remix 6-9 Cheats Hints gallery:
6-9-1-a: Help the man safely jump off the cliff!
6-9-1-b: Provide a soft landing for him.
6-9-1-c: Give him something to slow his fall.