New allegations of questionable behavior by Athenahealth Inc. CEO Jonathan Bush are emerging as the health technology executive attempts to fend off a takeover proposal from an activist investor. In the past week, Bush has apologized for assaulting his ex-wife, and public records have surfaced alleging that he subjected a female employee to what she described as a “sexually hostile environment.” Now more examples of potentially inappropriate behavior by Bush have emerged. A 2017 video clip seen by Bloomberg of Bush at a health care industry event features the CEO dressed up as a race car driver, pretending to be the title character from the 2006 comedy “Talladega Nights: The Ballad of Ricky Bobby,” and at times reading from a cue card. Midway through the skit, he says he wants to “jump down on” one of his female employees “and do inappropriate things.” He then briefly pauses.