Run away, full force.

He instantly turned away, sacrificing his stealth and using all the force in his body, hoping the primal creature wouldn't be interested in his skinny little body.

Sadly, he was wrong. Since every single little bit of meat meant a little bit more time lazing about without having to hunt:

The blacktooth rushing behind him, and seperated his torso from his legs.

[You have been dismembered, -60 hp.]

[You are inflicted with the [Extreme bleeding] ailment. Health -50 per second for 20000 seconds]

[You are inflicted with the [Extreme internal bleeding] ailment. Health -100 per second for 20000 seconds.]

'Well... Damn, not even a skill?' Gon contemplated, he died without it even trying. He wanted to be the best, but he had died to something that was considered a weakling in the grand scheme of things.

[You have died]