So many of these things (and I've seen a few of the above) require a question and answer session rather than guesswork.
e.g. #6, the man dead in a phonebooth, a little further discussion will normally get the details that he is/was a sportsman, and the phone is off the hook. This won't help much, but might jog a few memories.

#2 is probably the one to use as a give-away (as requested by guest;peedeecee) George & Martha are goldfish. The broken glass & water will explain how they died!

Nigel