the Lucille Ball incident

There are very detailed description in the "Careless Love" book following chapters: " A night at the Opera" and "Freefall"

Peter Guralnick describes two key moments in the 70's of Elvis drugs' abuse: august/september 1970 (the "changing in the weather" moment -meaning Elvis fall in his old habits) and the February 1973 gig - a "watershed" in that "impossible month", to quote Peter.

So, what happened in the 70 "changing the weather moment" and the 73 "watershed"?

1970 is discussed on this topic, and 1973 must refer to his over-the-top anger and vendetta against Priscilla's boyfriend, Mike Stone, following the incident where a bunch of men jumped on stage during his show.