system
Given the following post, respond as if you're commenting on Reddit:
human
[MCU] How did Iron Man defend against the Power stone with his shield in Infinity War?

In Infinity war Thanos shoots the power stone at Tony Stark and somehow his nano tech shield was able to stop it? The same power that obliterated Ronan the Conqueror and took 5 GOG with one of them being a kind of demigod to use? The same power used to hit Captain Marvel into the atmosphere?
gpt
Thanos didn't fire it at full power, he was holding back. You can choose how hard you hit with it, for example he uses it on Thor's head and doesn't immediately take it off and same with Nebula in the scene he tortures her to get Gamora to reveal where soul stone is.