Show not tell

Show, not tell: "Oh Damn"
The spanish version of Opal was full of telling, *facepalm* which meant: "Time to rewrite!"
If I'm excited about a particular action scene, with a lot of kicking, guns, knifes, and stuff, how can I make it exciting for the reader, and at the same time, write it at an acceptable pace? It seems that the best scenes in my book are written so fast-paced it makes it hard -even for me- to care at all about what's happening. I need to fix that.