Bheem being able to tear a cell door out of the ground makes more sense when you realise that thanks to their design, they're constantly exposed to the elements, which in India includes more than enough moisture to ruin the wood and metal.
Why did Ram let Bheem make the kill shot on Buxton? Buxton wasn't around when Ram's whole family died, and likely never knew it happened, but he was definitely around for the kidnapping of Malli. This means more to Bheem than it does to Ram.
The solitary cells are holes in the ground with trap doors that have bars to let in the sunlight and rain. In tropical India. Do they just flood over every time there's a storm? How many prisoners have drowned in there by now?
Even in tropical India, getting three feet of water in the space of one storm is an awful lot. Of course, if the area actually DID flood, the prisoners would definitely die first, a flood is what it'd probably take.
