And most studies that <i>have</i> been done, are done by people from the medical field, who are at best only qualified to comment on a slight portion of the issue. Their conclusion is always &#x27;if you fall sideways on a curb without a helmet, you&#x27;ll be dead&#x27; (duh), but then the dangerous part is where they conclude &#x27;so we need to wear helmets always, and make them compulsory&#x27;.