He knew certain voices immediately. Lois of course, and a handful of other non-heroes as well. Bruce's voice was very familiar, even though he rarely called for Superman, or shouted.
The fact that he did, coupled with the uncertainty and hint of fright made Clark move even faster. He was there in minutes, arriving with a wind that shook the nearby trees and scattered leaves everywhere.
"What's wrong?" he asked, trying to keep his voice calm. Two upset parties wouldn't help anything, and someone had to be calm, no matter what the situation. He then noted exactly where they both were and exactly who's grave they were in front of.
"....Oh no," he murmured, looking from Bruce to the grave and realizing what day it was.