Does a defendant have to make a timely objection and/or request for admonition to the jury?

"A defendant will be excused from the necessity of either a timely objection and/or a request for admonition if either would be futile. [Citations.] In addition, failure to request the jury be admonished does not forfeit the issue for appeal if '"an admonition would not have cured the harm caused by the misconduct."' [Citations.] Finally, the absence of a request for a curative admonition does not forfeit the issue for appeal if 'the court immediately overrules an objection to alleged prosecutorial misconduct [and as a consequence] the defendant has no opportunity to make such a request.' [Citations.]" (People v. Hill (1998) 17 Cal.4th 800, 820-821.)