Hi Winterlight.
Thought it was good actually - keep the first ending and build on that. I like the joke that he's taking the old people down with him.
If it were me, I wouldn't have the old people as passive - that seems to be quite a common comedy technique and, if nothing else, it's maybe a bit dull. Why not have someone try and call the police? How would len react? I'm just throwing it out there yeah!?