“I don’t know much about art, but I know what I (don’t) like”...;-)
Though I had not written down the painter’s name nor the title of the work, I just searched for “pencils” on SFMOMA’s ArtScope and found out that it is James Rosenquist’s 1983 oil painting “Leaky Ride for Dr. Leakey”, 78 x 198 in., i.e. roughly 2 x 5 m.
Wait a minute... two by five meter? That guy must have been much closer to me, then... Heck, maybe he even loved the painting...;-)