These are cool! The look on your face is very good, showing fear. Are these meant to be horror or drama themed? It looks like drama, until the end when you manage to free yourself, which shows a lot of self-sufficiency and personal heroics.
I think an adventure-themed variation on the "tied up prisoner" theme could be cool. You know how in adventure cartoons, they always tie their victims with rope rather than the more common household materials such as duct tape? And how they use a LOT (since it's not real, they can afford to) of rope? And how the prisoner doesn't look *too* scared, just mildly concerned? That would be really cool, if you could try that as a variant. Think you might sometime?