Whomever culled these must be obsessed with her. Over the years, I have watched several full length interviews/speeches/round tables with Marissa. A while she has laughed, it was never to this extent. Perhaps she has become conscious of her laugh and diminished it somewhat.
Anyhow, the internal grumblings about her being pushed out as CEO have recently quieted. She's highly intelligent... although someone on Youtube comments nailed her Achilles heal by saying "everything she does is always centered around how her own brain functions, and therefore she refuses to see things from different perspectives." Perhaps this makes her shortsighted.
I also just realized she's like a hotter more refined version of Lisa Kudrow.