In the end of Fantastic Four: Rise of the Silver Surfer movie, Silver Surfer killed Galactus. I couldn't digest it because it was Galactus who awarded Power Cosmic to Silver Surfer in the first place.
I haven't read too much comics of Silver Surfer, but as per Silver Surfer cartoon of 90s, Galactus has given Silver Surfer only small amount of Power Cosmic and possibly he can take it away from him.
I am interested to know what comics say about this. Can Silver Surfer kill Galactus? I am skeptical because even Thanos with Infinity Gauntlet had hard time subduing Galactus.
There are two heavily related parts of this question:
Can Silver Surfer kill Galactus if Galactus doesn't do a thing (sleeping, didn't notice Surfer etc)? Means, is killing Galactus under capability of Silver Surfer?
Can Galactus stop Silver Surfer by taking away Power Cosmic within a flick of a second? Means, can Silver Surfer kill Galactus after announcing that he was going to kill him (exact movie scenario)?