With all the people he's trying to keep an eye on at any given time, and without the full extent of his senses that he's used to, well. Sometimes people slip through the cracks when he isn't looking. Granted, he's not looking because he's sharing a quick smooch with Sephiroth, and he's in the middle of a party, but still.

It's Mithrun who ends up snitching to him about Cloud's stupid awkwardness making him leave the party in the exactly direction he shouldn't be leaving.

And because it's Mithrun, Angeal knows that it is only from divine miracles that the elf managed to end up back at the party somehow, let alone to his side. So after leaving Mithrun with another boyfriend, Angeal says a quick thanks to his boots for wearing them and then heads off to find the idiot that is Cloud Strife.

When he finally catches a glimpse of that too blond hair, it's far too deep into the forest for Angeal's liking, and next to someone he didn't see at the party and sure as hell never saw in Town.

With Cloud's luck and, worse, his personality, he'll either have forgotten the rules they were given or thinks they're hogwash. So Angeal calls out first, just to get in the way before (hopefully) any conversation actually happens.

"HEY, Zea Mays! Wrong way out of the party! Don't tell me you never got taught proper navigation skills in SOLDIER."