Leaves going weird on me

this is a bit of an odd one, dont really know if i should be worried or what i need to do, or what is wrong, but a couple of leaves on two of my plants have started turning sideways!!! i noticed today when i turned my fan off.....whats wrong? what do i do?

MellowHaze said:

pics would help could be a few things

Click to expand...

here are some pics, two out of my 6 plants have 2 leaves turning sideways, the bottom true leaves. also on one of them the stalks holding the sideways leaves have begun to droop slightly, the rest of my plants seem healthy. its hard to see in the pics but i hope(for my plants sake) you can help

250W hps, will take more pics in daylight tomorrow. how would i have got mag defficiancy? i water whenever they look thirsty. last watering was yesterday