There are often points in video games where the developers want to slow things down a bit, so it forces players to walk. Either this is because they want players to digest new story details, introduce new gameplay mechanics, mask loading screens, or simply because that is the way they chose to design the game. Whatever the case may be, it can often annoyingly break things up as it forces players to do something scripted and can take away from other fun activities. While Marvel's Spider-Man 2 is not the first game to do this, it really should be the last.