Scientist healing thing

[Alexis Wasilla]

I can't quite remember but I thought that if you were low on health and interacted with a doctor they'd pull out a syringe and give you some health. I can't remember ever seeing that in my game but I'm not sure

[9seed]

They have to be following you, but yes.

[phillippi2]

You press and hold the 'Use' key while looking at them

[Blyte]

I think you can not have more than 30% health.

[Sixteen60]

i think you had to be low health to use that feature (even on half life source)

[Ikagura]

It's very useful in the harder modes as the health stations only have 25 points in them.

Speedrunners also love them because it takes much less time than getting 20-30 HP from the station.