The film opens with Stan and Ollie in court, charged with vagrancy.
Judge: "Are you guilty or not guilty?"
Ollie: "Not guilty, your highness"
Judge: "On what grounds?"
Stan: "We weren't on the ground, we were sleeping on a park bench".

Given just one hour to get out of town, they bump into a drunk (Arthur Housman) in the street, drenched from the pouring rain. Having lost his key down a grating on the sidewalk, the boys offer to try and retrieve it for him, with hilarious consequences!
I've seen this film so many times now and yet I still laugh when Hardy and the drunk go flying into that thing!!

I don't know if it's just me but does Ollie not mouth Housman's next line when he is holding him up in the rain?  Watch for the scene where Stan is trying to get the key from the drain. Ollie says to Housman "we'll have it in just a jiffy" - then watch his mouth mutter the line again, anticipating the next line of dialogue.  It's subtle, but I'm wondering if that was a mistake or deliberate?

Whilst this commotion is taking place a patrol cop happens to walk by.  Isn't too long before he's down there too!

Next up, the drunk takes Stan and Ollie back to 'his' house but by the time they arrive he is totally out of it, so the boys have to look for a way in.
One funny gag occurs when Ollie gets down on his hands and knees in a motion for Stan to climb on his back; "let's see if he's in there". So instead of doing what is obvious to everyone, Stan also gets on all fours, believing (for some reason) they can see into the window whilst facing the wrong way and being on the ground.  Classic.

When the trio do manage to get into the house, the drunk staggers upstairs and is confronted by the butler who tells him he has the wrong house.  Oblivious to this Stan and Ollie make their way to a bedroom, get acquainted with the housewife and get into a laughing fit.  That is, until the husband (the judge) comes home and catches them all together.