I tried sledging down the hill opposite a few years ago but it's a bit steep for my liking - it's actually a slay heap from the old mines here and is about 30 degrees with large lumps of rock just under the surface. Good acceleration but pretty painful!
My own gentle slope is good enough for me, as long as you watch out for the greenhouse on the right
And the traffic cone? Well I was a student once and old habits die hard