Hmmm...

In case of suspected attempts to hijack an airliner:

1. Light the "fasten seatbelt" sign, alert the cabin
that those passengers not wearing a seatbelt will be
killed in ten seconds.

2. Ten seconds later, depressurize the cabin. At
FL 300+, this should do nicely

3. Full left rudder, then full right rudder. Then stabilize
for a few seconds, then invert and repeat. Practice in the
simulator helps.

4. Roll upright, wait a minute, then send the copilot back
in the cabin with the portable oxygen. Using the fire axe,
chop hard at the neck of anyone not belted. Repeat as needed.
Stun guns that shoot projectile darts can also be used.

5. Alternately, continue to use exciting rudder until landing.

I'm guessing future terrorists will be more interested in
renting a large moving van and buying fertilizer...