Leaves twisting after flush?

Has any one else had this happen? is it normal?
Another question, does flushing stress the plants? I have 3 females 2 weeks into flowering.

i havent had any sorta of leaf twisting before... flushing doesnt stress the plant... but it should only be done between veg/flower stages or if you need to flush the grow medium due to salt build up... when was the last flush you did?? why did you do it?? do you have any pics of your plants twisting??

I flushed b/c my ph was on the acid side, and was starting to get leaf curl. I had the same prob with one of my other plants and flushing made a big diff...
I flushed earlier today and the twisting was almost right after. It has been quite a few hours, and the twisting of the leaves has gone away, or I would have posted a few photos for you.