Well, a buddy and I decided to spend the night out in the woods, it was neat getting there cause I got to use my extracycle loaded, carrying him and beer and stuff on the back. Anyways at some point I went away from the fire where it was bright to somewhere pitch dark, didn't see the edge of the cliff... That made commuting a non issue for a few months, they let me come home a few weeks ago. You know you got hurt pretty bad when it gets on the front page of a provincial newspaper.
It's been ~5 months, need crutches to walk, hurts fairly bad. As for riding a bike once warmed up I used to rev around 100-110 and keep ~30km/h average downtown during rush hour. By comparison now even pushing myself I can't rev much harder then ~90rpm and that hurts after 2-3 minutes. Riding on the flats I'll reach a peak speed around 25km/h and it'll hurt after 2-3 minutes.
So, electric bikes really aren't neat toys to me anymore. With it I can almost get around pretty much like before to the point where the leg injuries don't really affect running errands and such, as far as the riding around on a bike part is concerned anyways.
In a pinch, if you need a motor to keep riding say for a temporary injury, these days wallmart type stores have disposable electric bikes reasonably cheap. And it won't be lost either cause while electric bikes kinda suck for riding around, but you'll want to keep it for a utility bike cause they're wonderfull for helping haul stuff uphill and get back up to speed after stopping.