Natural Double Jumping
I seem to remember in Pogamut 2 an option for a "custom" jump, namely a numeric parameter that could be sent with a jump message to control the height. This was unrealistic too, but it would probably be better than the double jump in Pogamut 3. However, I've looked at the Jump class, and it's pretty boring. All it has is a boolean for whether to double jump or not; no numeric parameter.