Overheard:

As soon then as he had said unto them, I am he, they went backward, and fell to the ground. (John 18:6)

As soon then as he had said unto them, I am he, they went backward, and fell to the ground. This is the main one falling backward to the ground is slain in the spirit. Itsa phrase used by pentecoastal denominations to describe falling backward under t he power of the holy spirit . this scripture mainly supports it but here 2 more

I would suggest that moving backward and (then) falling down is not the same as "falling backward." Moreover, it does not suggest even a hint at an altered state of consciousness.

The four and twenty elders fall down before him that sat on the throne, and worship him that liveth for ever and ever, and cast their crowns before the throne, saying...

There! See? Slain in the Spirit!

And it came to pass, when the priests were come out of the holy place, that the cloud filled the house of the Lord, So that the priests could not stand to minister because of the cloud: for the glory of the Lord had filled the house of the Lord (1 Kings 8:10-11

We,, I couldn't stand to be put in the cold yesterday, but I wasn't slain in the Spirit.