Water from overhead lockers...
A few years ago somewhere in the East water started coming from the overhead lockers,
and the guy seated ahead of me demanded to be re-seated (in business of course).
The stewardess would not do this.
Later she told me that some passengers place a loosely closed
water bottle in the locker above so that water will leak as the
aircraft climbs. Apparently this is a well known trick.
Still I was not re-seated either.