I've done a local authority style risk assessment based on the option 'C' scenario and the two main risks I have identified are:
1. I rip the crotchal area of the trouser when bending down to pick up a fag-end.2. I see something/someone scary and actually plop myself.
I don't think there's much to worry about as:
1. I don't smoke.
2. I'm really tough and nothing scares me.
There's always risk 3 to consider tho'.... and that's what my mother would say
Don't you have a butt plug you could use, you must have one lying about in your bedroom?