Once a first aider begins to provide first aid, a duty of care is established and the first aider then has a legal obligation to fulfil the duty of care. If a road user is involved in an accident, there is a legal requirement to stay at the scene, assist the injured and report the incident to the police.
If you do not have options, I believe your answer is obesity. If you do have options and this isn't one of them, please comment on this question and tell me what your options are. I would love to help.<span />