Fred felt the pull of side-along apparition before he realised what was happening. Being out on the streets, under the street lamps that had just turned on for the night, gave him a clarity that was hard to reach inside the Ministry. He was so distracted by the change in emotion, he hadn't registered James's arm on his again until they were already there.
He stumbled away from their landing spot, and held onto a post while trying to right himself again. James's words made him start again, though, and he staggered off down the sidewalk towards the next muggle mailbox, holding on to keep himself upright, and glared through the windows of every house on that street.