6 hours at LAX? That's a long time to be cooped up in the airport.
If the weather's nice and you like burgers, take the free Parking Lot C bus to Sepulveda Blvd. and walk to In-N-Out. Freshest and tastiest fast food on the planet, and the grassy area right outside is a great vantage point to watch all the air traffic landing at LAX.