My Airline experience is no where near as bad but I used to fly regularly to Dublin for work and on one return trip home I boarded a delayed Friday night flight back home on a Ryanair BAC1-11, we were all aboard and the aircraft was pushed back to start the engines but they couldnt get the right hand engine to light up so an engineer appeared with a step ladder and proceeded to remove covers for a fiddle, he gave the crew a thumbs up and they tried again but they had to call for an airstart, the said truck arrived and was connected up and they got the engine running so covers back on, second engine started and we were ready to go, by this time there were several engineers stood by the right wing tip and as we went to move one of them stepped forward and in full view of all of the passengers on the right side placed one hand on the wing and with the other made the sign of the cross on his chest, I've never heard a passenger area go so quiet so quickly, we took off and returned back to Stansted with no further problems.
As an ATC Cadet we were on our summer camp at RAF Colegne and our air experience flight was from RAF Lynham aboard a Bristol Brittannia, the aircraft had come off the maintenance line so this was a check flight, we took off to fly the coast line all the way up to Prestwick and then come down the east coast we got as far Prestwick and the crew announced we were going straight back to Lynham as they had a problem, whilst they were telling us this they shut the starboard side inner engine, we arrived back to find every ambulance, fire engine and other vehicles waiting at the end of the runway for us to land and some of us noticed why as when the undercarriage and flaps were lowered gallons of oil flowed out because of a leak.
For us cadets it was such fun 
Martin P