I guess I could have been clearer to answer your second question.  
"Experiences" have more of a mind/qualia connotation and even imply mind/qualia, and "observation" doesn't have the connotations even though observation implies experience.  Observation is the Trojan horse that I can use to bring down the hard physicalists. 
Observation is a type of experience that science or empiricists must accept for there to be science, empiricism.  Now, all other experiences science cannot find, don't really use and cannot even acknowledge exist, and rightfully so based on the scientific method.  Pain, for example, is not observable.  That is one of the kinds of the elusive qualia. 
But when it comes to the experience of human observation (usually visual for science), science can't deny that one because it uses it.   
So we start with acquiring information with observation, not just scientific information but much of our total information.  Now, that information does not carry with it the existence of observation.  We start noticing that there is no observer/experience in all of the information that we processed.  But we forget it was the observation that brought about the information in the first place.
		
		
	 
If you think pain isn't observable, you clearly are not a first aider and have been very lucky.  What you mean is that pain cannot be communicated via what Wittgenstein called 'language games' - it can't be symbolically communicated through something else, words for example, standing for the pain via conceptualising judgements.   Pain can be perfectly well communicated by subsymbolic pain behaviour, what ethnologists call 'signalling'.  There's a whole host of communication that is built into our biology and for which there is a slightly less 
contingent relationship between pain and pain behaviour than one finds through mere language.  
Language and especially intentional talk are comparatively (and very) recent mind tool tools that trade being real for ease of use, specificity and generality. Most of the time its a good trade, but when you compare them to communicating in something closer to wetware 'machine code'. They are shit and give rise to the illusion that we cannot communicate in older, more bespoke ways.  Anyone who thinks we cannot communicate inner states and processes directly must have a really dull sex life. 
More to the point, if, for this sort of non bicameral non conceptual content (that is, phenomenology that doesn't intrinsically or conditionally have both a conceptual and a non conceptual aspect) to think of the mental state not being the physical state just looks like indefensible dualism. When we get down to pain processing in the pain matrix of the brain there's no reason not to conclude that the nociception just feels like something to have, even while it is moderated by systems like the PAG. As such, if you make the metaphysical assumption that in 
some circumstances that the mental state just is the processing state experienced from the inside, then the whole problem about a scientific grip on qualia looks an awful lot less of a problem.