im with scrap value,you really have to learn on dirt bikes to get a thorough feel,plenty of brake lock ups and powersliding is how you ride dirt,we used to practice in a mud bowl with the front brake on and power straight ahead,feet up dohnuts on gravel or sand,ive had plenty of low speed and high speed dirt crashes and there is a technique to knowing exactly when youve lost it ,with no chance of regaining it,now to plan "B"all in less than half a second start thinking how to land or slide or tumble or stay on the falling/sliding bike?all this is what a lot of road only riders dont learn because youd have to trash a fully faired road bike or a chrome cruiser to do it,dirt bikes are built for this more or less,sure we had a few busted wrists and collar bones amounst us,adds that touch of saftey for next time,we were all pretty good riders on dirt into our thirties,im the only road rider of them all,and they have all settled down etc with no bikes,a guy a few doors up from me in his late 50s or early 60s has just decided to learn to ride a bike,i doubt hes even ridden a bicycle in years,i know him and was told on his third lesson with a school hes dropped the bike and ended up with a broken or fractured collar bone and wrist or something,i dont know the full story like was it on the road or in a training area or what size bike etc,,so schit can still happen,in this case i think itll be a total lack of any experience on two wheels at all,my wife sort of wants to learn,shes 40 and im not pushing her!i said well buy an xr80 first and she can learn the same way i did,another thing is being a bit more mechanically minded,knowing what the bike is doing,whats going on under your butt can help you.