Time is another reed, or other nib, if one utilizes and expands within it. As alluded to by Kerouac, spontaneity is the most vital and defining characteristic of jazz. Thus, the conditions of Now are right for improv, which the talented musician recognizes, but which fall upon the audience's ears serendipitously. Simply, the technique is taken for granted and surpassed, while the attentions of the player only needs to be conducive to the opportunity for improvisation. The essence cannot be hampered by forethought or planning, by discrimination or discernment.
All thoughts are free, all thoughts are valid.
Time, once again, plays a role. This haphazard is present in jazz playing, too. I have to wait until it comes around again. Yet, his playing during this time is not wrong or embarrassing, but simply another performance. Finally, the last characteristic of jazz is the call and response, which declares an interactive relationship between the artist and the listener.