Rather oddly, too. Gelfand got in the first surprise of the world championship by playing the Gruenfeld Defense, an opening he used to love crushing in years past.
The second surprise came a few moves later, when after the moves 1.d4 Nf6 2.c4 g6 3.Nc3 d5 4.cxd5 Nxd5 5.e4 Nxc3 6.bxc3 Bg7 7.Nf3 c5 Anand played 8.Bb5+. Perhaps this was a one-off idea, a stopgap measure prepared in the seemingly unlikely event that Gelfand prepared the Gruenfeld. Whatever the case, Gelfand reacted very well and even enjoyed the slightly better chances thanks to the bishop pair and an outside passed a-pawn.
The third surprise was the disappointing finish. Gelfand made a pair of unambitious moves at the end and then offered a draw, which was of course accepted. Maybe he didn't have much, but ...Bd7 on moves 22 or 23 seemed to keep an edge; at a minimum, it kept the onus on Anand to neutralize Black's bishops. But it was not to be, and the game was drawn after 24 moves.