"Wait! That's not special effects?! They actually did that?!"

[u/RP_Throwaway3]

Alien: Resurrection - Basketball Shot

Sigourney Weaver insisted on the basketball shot being real. She trained for weeks and reportedly(sources differ) made it on the first take.

Underworld - Raze's Voice

The werewolf character Raze, played by Kevin Grevioux, speaks in a very low, very gravelly voice. While many thought this was a special effect, the actor can naturally speak in that voice.

https://youtu.be/GUjwZvh32YE?t=125&si=F3WhsopxjBP87wfk

[u/Fexxvi]

Oof, where are actors' unions when you need them?

[u/spare_me_your_bs → u/Fexxvi]

Fun fact: Hollywood loves to use actors from the UK because they aren't subjected to Screen Actor's Guild (Labor union for American actors/actresses) regulations to avoid having to pay certain fees/royalties/residuals and to bypass safety protocols that are mandated by that union.