- Recurring Objects-
Dave
 
Globes - Rocks - Shoes

Globes

There is a globe in the rec room at Santa Rosa Institution.

Rocks

During the basketball game, Dave yells at the players "Dude, dude, give up the rock!"

Shoes

On the island, Hurley chases after Dave, and finds Dave's slipper in the jungle (and then gets peanut butter all over it): proof that Dave is physically present on the island. Or is he?