Make your phone stand in sky(just being poetic in saying made on board flight).
Not always are you offered with awesome in-flight entertainment. You might rather want to watch something from your phone and watch it hands-free.
Here is an instructable that helps you with the hands-free part.
First of all, The resources at your disposal are limited. The scissors, lights, matchbox, swiss-knife, screwdriver(no one carries a screw driver... just making a point) would have been dumped at the security check point. So, lets make the most of what is available.
Step 1: Air sickness bag & cup of water
Fish into the seat pocket for the Air Sickness Bag. Look for it frantically in case you want to freak you co-passenger.
Ask for a cup of water from the cabin attendant and gulp it down.
Step 2: Draw a circle
Draw a circle with the cup's rim on the top end of the paper. Don't expect your co-passenger to lend a pen. Toying around with Air Sickness Bag means you are on your own.
Step 3: Tear out the circle
Fold the paper along the circle diametre and tear out a circle that's about 3mm less in dia, large enough for the cup to pass through the hole.
Step 4: Insert the cup
Insert the cup through the hole and ensure the rim does not pass through.
Step 5: 'M' shaped fold
Make an 'M' shaped fold about 3cm from the cup. Fold the last flap backwards.
Step 6: Place the phone between the ridge and the cup
You have yourself a phone stand made completely with materials on board.
Step 7: Watch your favourite show
Also look for the relief on the co-passenger's face.