
Steal a helicopter. Dress like ninjas.
Show you have a sense of humour by placing a bag outside the cops' helicopter hanger with the word BOMB written on it. This will stop the police chasing you in the sky.
Scatter small sharp objects on the roads around the bank you're targeting to slow down approaching police cars.
Rather than targeting a regular bank, choose a facility that stores banknotes for them.
Get schematics of the building.
Plan the raid for the day before people get paid, so there'll be lots of cash kicking around.
Hover the chopper over the bank while your men abseil in.
Have a pilot so good that authorities suspect military experience.
Set off some minor explosions to get to the cash.
Chuckle at the cops as they try to get into the fortified building using a battering ram.
Leave all the staff unharmed.
Return to the helicopter and fly into the pre-dawn sky.
Land the chopper in a field.
Disappear into the woods with the loot.
Roll around in your money.