One of the most interesting things (in my opinion) about the ADHD brain is that there's a difference in the "stop" and "go" mechanisms. According to the National Institute of Mental Health, brain studies have shown that some people (particularly males) with ADHD tend to have unusually symmetrical frontal lobes. The right lobe is associated with caution, the "look before you leap" tendency. The left lobe is associated with curiosity and a willingness to approach something that is unfamiliar or unusual. Most people have a slightly larger right frontal lobe - ie. more caution in approaching something unfamiliar.
So if it's true that there's a symmetry in the ADHD brain that causes one to "leap before looking", imagine how much worse this tendency is in a teenager whose frontal lobes are not fully developed yet.
Will this change how you look at the teenagers in your life?