1. Only when slapped.
2. My intention wasn't to "slap your face." (Yes, that would be percussion.) You paraphrased something I said. From that, I assumed you read my post and were at least in part replying to it. If not, my regrets. Besides, even if you weren't replying to me, i can still reply to you if I wish. This is, after all, a public forum, not instant messaging.
3. In this context, you use English very well for a non-native speaker (and better than some native speakers I've read here), so don't think I'm criticizing that. This just happens to be an issue on which, by whatever accident of life, I've ended up with some expert knowledge, in two senses (musical and linguistic). No big thing.