Good one Bob, though I am not familiar with the original comic strips and haven't seen the Bob book except for a few excerpts to me this looks as if Bob is sitting ontop of Another Pleo, poor Pleo that has been stripped of his skin, and the green " grass" blades that we see are actually Bob's skin, peeled away as if he had been under the spell of a Mad Scientist, named " weed",

I think it is all a terrible thing to do to poor Bob , as if this Pleo didn't have enough " self esteem " issues already. :(If you want to claim that this is actually a mix of ST. Augustine and crabgrass from your lawn, you will have to be more clever than that. You are devious now aren't you, trying to pull the wool ( or in this case stripped skin) over some Pleo's eyes.
On the other hand, Bob does look almost like he is driving or hanging upside down as degers suggested, but I think you have more power over your Pleo subjects than I would like to admit, Power hungry you are, Bob just needs some kind hearted soul to save him from this sort of ridicule, He needs his own patch of grass like he needs a hole in his head.( although he does have a few I think, and perhaps a few in other places, that could use some patching.

)
Can you give us anymore clues you Pleo Picking Procurer, Please.....!!!!
Well, I tryed anyway, it was Nova that made me guess, she has a wild imagination, it is all those crazy clothes she wears and the neck brace has cut off oxygen from her brain a little too long think I.

RedwoodsMama and MS. ( know it all ) Nova and Friend