Bunch of thieves rob a bank. One of the thieves fills a sports bag with 30+ gold bars and subsequently runs away.
The “subsequently” is the part the movies always get wrong.
A standard gold bar weights 12.4 kilograms (more than 25 pounds), meaning that the thief just ran away with a bag weighing more than 372 kilograms (820 pounds). In real life, the thieve only can run away with a couple of bars — apparently every single member of the gang skipped Physics or Chemistry class (or maybe even Mathematics) when things got interesting.
Gold has a density of 19.3 gg/cm3cm3, making it actually one of the heaviest materials on Earth, and one of the very worst materials to try to steal.
So know your Science when you write up a movie script (even if about robbing a bank) —
And don’t ever forget about Gravity.