I embraced a cloud,
but when I soared
it rained.
3
That's funny! there's blood on my chest
oh yes, I've been carrying bricks
what a funny place to rupture!
and now it is raining on the ailanthus
as I step out onto the window ledge
the tracks below me are smoky and
glistening with a passion for running
I leap into the leaves, green like the sea
4
Now I am quietly waiting for
the catastrophe of my personality
to seem beautiful again,
For the fourth section of the poem, O'Hara seems to be having a dialog with  “Past One O'Clock …” by Vladimir Myakovsky 
 So but this poem, “Mayakovsky”, got its title from  James Schuyler , who found two two-section poems by O'Hara (that became sections 1 and 2, sections 3 and 4) and decided to combine them into one poem. The poem needed a title, and Schuyler, seeing a collection of Mayakovsky on O'Hara’s desk, decided it should be titled after Mayakovsky. 
 So we can say pretty easily here that O'Hara was aware of  this poem by Mayakovsky , which was found in his pocket when he was found dead, and is sometimes referred to as his suicide note. It is not O'Hara’s suicide note. But, tonally at least, shit is pretty striking.
Mayakovsky