Dr. Evil rears his head.
A paranoia set in that trump might have been 4-0. I wanted to have the luxury of testing with a high trump and ruffing 2 spades. But communications kind of sucked, so I played a
♦ at T2. RHO (Dr. E) wins the KING and taps dummy with a spade.
So the fear that trump were 4-0 is becoming more real. I ruff a diamond, and RHO pops Ace. Well I don't think he has AK - tight, but its barely possibly, especially since DRG on my left is preempting at adverse with a 6 card suit, and we all know what kind of standards 20-somethings have for their preempts

.
Reconstructing a little at this point: LHO has 6 spades and 3-4 diamonds. He doesn't have a stiff heart and xx of clubs (else he would lead the stiff). So LHO is 6=2=3=2, 6=3=3=1, 6=3=4=0 or the like.
I continue by ruffing a spade, and I need to get off the board. Here I make an error; if I truly think its possible dank has J-4th of clubs, I should ruff the 3rd diamond now (known to be safe, since RHO won the AK
♦, so the Jack is on my left). But I play a low heart toward my hand instead, since I'm expecting the
♥A to be on my right for the x. But LHO wins and fires back a heart and I'm in dummy.
No problem, ruff a diamond, cash a high club to check the break. If they are 4-0, I can cash hearts and play a diamond off the board and pick up Dan's trump.
I win the heart on the board, play a diamond, ruff, OVERRUFF! Dan was jokering me all the time with AKJxx of diamonds! The entire hand: