A Brazilian drugs trafficker was killed by his own stock when he was crushed by half a ton of marijuana.
The man died after he lost control of his car and hit a tree, resulting in his stock of weed stored in the backseat shooting forward, squashing him against the wheel.
I suppose something very similar could have befallen the driver if he'd had three morbidly obese passengers in the back seat. Think "Whatever Happened to Gilbert Grape", but with the fat lady riding behind.