I can provide some general advice on what to do if you find yourself in a dangerous situation like the one you described:
Stay calm: In high-stress situations, it's essential to try to remain as calm as possible. Panic can impair decision-making and physical abilities.
Assess your surroundings: Quickly evaluate your surroundings for potential escape routes or places to seek shelter.
Run and seek help: If possible, run to a safe location or a public place where others may be able to help you. Call for emergency assistance as soon as you can.
Use self-defense techniques: If there are no other options, and you feel physically capable, you might attempt to defend yourself. However, this should be a last resort, as confronting someone with a chainsaw can be extremely dangerous.
Be aware of potential weapons or tools: If there are any objects nearby that could be used for defense, like a stick, a heavy object, or anything that could create a barrier, consider using them if you can do so safely.
Stay vocal: Yell for help or make loud noises to draw attention to the situation and potentially scare off the attacker.
Stay aware of your surroundings: Be vigilant and try to anticipate the attacker's movements, but also be cautious not to put yourself in further danger.
Avoid engaging in conversation: In a life-threatening situation like this, it's better not to engage in dialogue with the attacker. Focus on your safety.
If you can't escape or defend yourself: If there's no way to escape or defend yourself, consider complying with the attacker's demands if it might increase your chances of survival.
Please remember that these are general guidelines and may not apply to every specific situation. In any dangerous encounter, personal safety should be your top priority. Always trust your instincts and, if possible, seek self-defense training or advice from experts to prepare for such situations. If you find yourself in immediate danger or witness someone else in danger, call emergency services immediately.