From the sites I have read, it appears the reference is a taunt responding to another taunt. The enemy he was trying to conquer stated even their lame and blind could defend against David and his men.

This site has a good explanation about it: https://achapterperday.wordpress.com/2013/04/20/2-samuel-5-did-david-really-hate-the-blind-and-lame/

“Remember, this is what David is saying this to his men. They all knew that they had been taunted by the people of the city. They all knew that the people of the city had said that the lame and blind could keep the armies of Israel away. David is basically said, “Okay, let’s see them (their blind and lame) try it.” Basically, he was using their misplaced confidence as a motivational tactic for his men. He hated the men that taunted him, and in this case it was the men who defended the city. The men who defended this city said that the blind and lame could do it. Therefore, David was saying that if this is actually the case and the blind and the lame are really defending that wall, let them try to hold us off.

David hated them because they taunted the children of Israel and God. He did not hate them because they had disabilities, and from what I can tell, we really do not even know if there were any defenders with disabilities. It seems as if this was largely a taunt thrown down by the inhabitants of Jerusalem which was then turned into a motivational technique by David.”

Another good site addressing this question: https://theworksofgod.com/2010/10/12/did-david-really-hate-the-lame-and-the-blind/

 

When I got to Samuel 28:12 I got to thinking about mediums and what they exactly were, etc and how she was able to have Saul communicate with Samuel. 

A medium is an intermediary between the physical world and the spiritual world. The link to this passage says:

“King Saul’s sinful use of a medium is recorded in 1 Samuel 28. The prophet Samuel was dead, and King Saul was frustrated that God had ceased telling him what to do through prophets or dreams. So the king, in direct violation of God’s Law and his own previous command, told his men to find a medium who could communicate with Samuel (1 Samuel 28:3). This medium conjured Samuel, and Saul communicated with the dead prophet. Theologians discuss whether this conjuring was a physical reappearance of Samuel or merely an image of him. There is also some question whether or not the medium actually meant to conjure Samuel, as she seems to have been the most surprised at his appearance—“When the woman saw Samuel, she cried out at the top of her voice” (verse 12). Perhaps she was a fraud who did not expect to actually see a spirit, or perhaps she was expecting to communicate with her “familiar” and not with Samuel directly. Either way, God seems to have allowed Samuel’s conjuring in order to drive home His point to Saul. The prophet’s message to Saul was one of doom (verses 17–19), and he died the next day. First Chronicles 10:13–14 reveals that Saul’s interaction with the medium was an important part of why he was dethroned and his dynasty cut short.”

The passage above is taken from https://www.gotquestions.org/what-is-a-medium.html – this has a lot more information. It also gives more information on why the Bible in both the New and Old Testament state this practice is a sin.)When researching through information for this post I also came across this book which I will be adding to my extensive reading list: https://www.christianbook.com/truth-behind-ghosts-mediums-psychic-phenomena/ron-rhodes/9780736919074/pd/19078?event=AFF&p=1011693&#CBD-PD-Description

MyPath2God.com recieves no money or referral fees from the link above. You can also buy it from Amazon (I just did to have it sent to my kindle.) I would rather give the Christian company my money, but being able to have all my book on one device is too much of a necessity.

From what I have read it seems that a prophetic ecstasy is a trace, or an outer body state where the person has no control of their body. 

“In the Old Testament ecstasy was associated with bands or schools of prophets (1Samuel 10:5,1 Samuel 10:9 ; 1 Samuel 19:20 ; 2 Kings 9:1 ). The ecstatic state was often accompanied by music (1 Samuel 10:5 ; 2 Kings 3:15-16 ) and rhythmic dance, though the “prophetic frenzy” was brought on by the onrush of the Spirit of God” https://www.studylight.org/dictionaries/hbd/e/ecstasy.html