He'd point to indicate if he wasn't already unloading pulse fire onto the people who think they can sneak up on them. 76 reminds himself that they have the high ground--they're already playing their cards right. All they have to do is hold their position.

Unfortunately, in being the first one to open fire, 76 has effectively let their pursuers know exactly where they are. He stops shooting just long enough to duck and pull Ina down with him, return fire whizzing over their heads.