Rescue What You Would Most Miss
You raise your wand and point it at the Giant Squid, murmuring a rather muffled 'stupefy!' through the bubble around your head. A jet of steaming water shoots out of the end of your wand. It won't work underwater! The water hits the squid's scaly side and he doesn't seem to notice. Now what?
2. Swim away as fast as you can
3. Remain still so he won't notice you
4. Use the Impediment Curse