Air India? By bus or plane?

Another Air India Story this.. but then again, with an awesome carrier like this one you know there will always be there stories...
Return flight from Mumbai to Singapore... Obviously being Air India, we don't just board the plane, but have to take a bus to it.. Yes, even for international flights...
The idea of taking a bus to take a plane always fascinates me... well not really, not the actual doing, its just the concept of it that is so amusing
So all of us already weary passengers wait and wait and wait some more for any announcement of when boarding will begin.. it is 12:20 already and nothing so far for our flight that is supposed to take off at 12:45
Then they begin shoving us into the buses to get to the plane.. All in, the bus takes off for a 7 min ride around the airport.. Bus stops, people get off and walk towards the plane... Steward standing at the base of the steps looks at the first passenger's ticket, then looks around.. looks some more, confused... and says:
"But you're going to Singapore and this flight is for Mangalore !!"
Sigh
And so on we go the bus again.. for a 15 minute bus ride this time..round and round the airport, till they FINALLY find our plane to Singapore.. by the time we're getting into the aircraft it is already 12:45, but then again.. it wouldn't be Air India if it actually took off on time !!