You never know, the kid was probably hoping for a career, being an air marshaller, and realised that maybe he was a little too close to the pilot and moved, so the pilot could see him.
The pilot who was probably shouting "put your arms Down" could'nt be heard and decided sign languge was the way forward and lowered the collective (lowering of hands) . I don't think the kid was 10ft tall. Nasty business.
Labarynth Seal
(Some JAR Knowledge is useful)
