Some of you guys need to stop pontificating about stuff you don't know. Managing gear temperature for larger and longhaul aeroplanes is essential If you have hot brakes on a turnaround and have to taxi out, they get even hotter. Then doing a take-off heats them up more, and can mean in the event of a reject that you will lose all the tyres anyway. Rather than retract hot brakes, leaving the gear dangling for4 or 5 minutes can be worth 40+ minutes cooling on the ground. A 747 on a couple of short flights will quickly run into problems. If you think you have the luxury of waiting for brakes to cool before every take-off, you are going to ground half the aeroplanes out there, so Cessna experience doesn't really apply here!
Zagorfly- that is a glowing example of how you can get the totally wrong impression of what is going on on an aeroplane from sitting in the cabin. It's touching and funny, but you are so wrong it's not even worth correcting you!