Here's a hand from a while back, on a club evening.
The auction went:
2NT - 3♣!
3♥! - 3NT
(3♣ asks about 4 or 5 card M, 3♥ denies)
LHO leads ♦6 and you get the following dummy:
RHO produces the Jack which you take with the King. First step is to develop the ♠s, so I lead ♠K which held the trick. I continued with ♠Q which LHO took with the Ace while RHO played the T. After some thought LHO continued with a ♠.
Now what? Do you finesse or do you play for the drop? This is a pure psychological problem imo. After the ♠T from RHO chances are big that I'll go for a finesse. So playing a ♠ now could be a desperate attempt to change my mind. On the other hand, RHO is a known false carder, with T9 he'd always play the T. So LHO may anticipate this, think that I'll go for the drop anyway, and try to change my mind by playing ♠. Against these opponents it was around 50-50, so I just played the Jack and dropped RHO's ♠9.
Ok so far so good. At this moment you have 11 tricks, opps have 1 trick, and you may have some chances of making a 12th on the ♣s or by means of a double squeeze. It's clear that LHO has ♦s so it's very well possible that RHO has ♣, in which case I can use the ♥s as a double menace. If ♣s are 3-3 then I'll still have my 12 tricks anyway.
For a simulanious squeeze, I can use the 13th ♠ to squeeze both opponents at once (after playing the top tricks of both minor suits, ending in dummy). For some reason I cashed the ♠ immediately, so that was no longer possible. However, a non simultanious double squeeze was still in the picture. Squeezing LHO would require a ♣, and squeezing RHO would require a ♦. Since I have ♥K squeezing RHO is the last step.
So after cashing the 13th ♠ (discarding a ♣) I played ♥A and ♣AK. Now I lead ♣Q in the following diagram:
On the play of ♣Q, LHO is squeezed in ♥ and ♦. He bares ♥Q and dummy lets go a ♦. Now I continued with ♦AQ and RHO is squeezed in ♥ and ♣. He decided to bare the ♥J so I dropped both ♥Q and ♥J with my King.
The entire deal: