Develop some C-41 film in Rodinal 1+25 + ~5g of table salt per 300ml (non-iodised) at 20c for ~8 minutes, stop, wash, fix, wash, bleach (not blix), wash, expose to light, then run it through a colour developer, bleach and fix from there.

Also don't overexpose with the above method, but you can underexpose.