alaska airlines flight 448 bound for los angeles was forced to turn around and return to seattle-tacoma international airport monday when passengers heard banging and pleas for help .
it was later revealed that the unnamed employee of airline contractor menzies aviation had dozed off inside the plane at the end of his shift and only awakened when it was in the air , about 14 minutes into the flight .
the trapped baggage handler 's desperate 911 call was released , revealing the man 's panic and terror .