Screen Shot 2014-08-17 at 3.39.27 PMEarlier this afternoon, Pando’s Sarah Lacy accepted LinkedIn CEO Jeff Weiner’s “call-out” to do the Ice Bucket Challenge, to spread awareness of the ALS Association.

Sarah’s son Eli did the honors, with a little help from me…

The chain started when CNBC’s Carl Quintanilla was challenged by Biogen, a pharma company that produces ALS medication…

Quintanilla challenged Twitter’s Dick Costolo…

Costolo challenges Zillow’s Spencer Rascoff…

Rascoff challenged LinkedIn’s Jeff Weiner…

…who challenged Sarah, who has now extended the challenge to Southland speakers, Al Gore, Christy Turlington Burns, Bill Ready and Andy Dunn. I’ll update this post if — when! — they accept.

UPDATE: Bill Ready accepts the challenge.

UPDATE II: Christy Turlington Burns writes to say that she had already accepted the challenge when she saw Sarah’s call-out. Here’s the video.