YSK if you're ever in a plane that crashes into water, DO NOT inflate your lifevest until you are outside the aircraft. Inflating your lifevest inside a sinking aircraft will cause you to float and become trapped.

YSK if you're ever in a plane that crashes into water, DO NOT inflate your lifevest until you are outside the aircraft. Inflating your lifevest inside a sinking aircraft will cause you to float and become trapped.

YSK if you're ever in a plane that crashes into water, DO NOT inflate your lifevest until you are outside the aircraft. Inflating your lifevest inside a sinking aircraft will cause you to float and become trapped.
from /r/YouShouldKnow