Crossing from St Mary's to Lands End a couple of years back. Half way across and the engine went quiet...then carried on as if nothing had happened. Totally focused my attention. Total time of silence, about one second even though it seemed like 10. Drained the carb on landing (they all have a drain plug) and found a small droplet of water. This was after doing a full fuel drain check prior to departure.
I have heard of this happening before but it was my first time.
And the chap sitting beside me, who happens to the the local CFI (non-instructional trip) said nothing...for about 1.5 seconds. What he and I did say is not reproducable here, but I am sure imagination will suffice.
camlobe