Han studies the blackness below. He sees nothing. Every second, the conveyor belt whizzes several tons of rock past. He hears the rocks bouncing and jostling against each other. He feels the belt’s tremendous power vibrating the ground upon which he stands. He even smells the earthy scent the rocks release as they smash each other to bits. But he sees nothing.
If he jumps and misses the belt, the massive pulley system that drives it could drag him into its works. It would grind him up like so much pea stone. If he jumps and does not miss the belt, any one of a thousand boulders could crush him. The belt will deposit the remains in whatever creates the hot wind blowing up the corridor.
But if he does not jump, he will certainly never see the Droid again. And that could mean never seeing Leia again.
As he stands above the growling belt, Han notices a rhythm to the crashing of the rocks. After the boulders crac together, they grind against each other for two seconds. Then, about a second, they remain quiet. Han guesses it will take a second or so to jump down to the belt.
If Han jumps when the rocks remain quiet, Click Here
If Han jumps when the rocks strike each other, Click Here
If Han jumps when the rocks grind against each other, Click Here