Reputable airlines have (or have access to) door simulators, where aircraft crews (cabin and flight deck) can simulate opening doors till their hearts content. With or without power assist. They even come with the sound effect of slides blowing.
Some airlines have fusealge simulators which open into water pools to simulate a ditching whilst rocking and rolling on the (simulated) waves.
Presumably Ryan Air doesn't adhere to this JAA requirement?
Trust this helps
