Why feed and water them and then play a movie and dim the lights to make people sleepy.
Because the test pax will be sitting waiting to start the test with their adrenaline already running and their own personal strategy for getting out. The objective would be to dull that by not letting them know when the test will begin.
It is correct that, in many evacs, the pax will already be wide awake and ready to make the evac but in an RTO due to a fault unseen by the pax? There are more than one kinds of evac situation. For example, end of 14 hour sector and a problem on the roll out? Many pax will be inebriated or hung over and not yet have put their shoes back on. Etcetera.
By the way, Otter, I surmise that in telling me to 'get a grip', you are already gripping yourself? Please remember to discuss the topic and not make childish personal remarks.