Gemini people play with their anger like hide and seek.
I mean if they are angry, then they will hide from you, and they will speak only all is well with you.
They are the person who will keep anger within themselves for a long time.
Even if they do not give any reaction to any action, they also can swing their mood immediately.
But you don't ever take the meaning of it as that they don't feel bad or they have forgiven you.
The anger is getting filled within the person of Gemini.
The day on which it will blast you will only think where so much anger was there.