No one's on the bridge, but he's spamming it just in case. Of course, the guy with the flag runs into one of his grenades and drops the flag. Fat Dragon runs out onto the bridge firing a dozen or so grenades. The enemy running for the flag dies too. Fat Dragon does it again.
Same thing happens.
He does it again. This time, he sets a 5 second detpack in front of the flag. Then he stands there. The enemy runs out. Fat Dragon runs out again.