However, cutting them from both sides at the same time

There were a pair of strange boxes in the hallway.

Ikalgo raced past the two Ants, and at the moment when he reached the elevator, the doors at both ends opened simultaneously.

At him from both sides!

Get 'im from both sides!

Then both forces attacked, one from either side…

Bridge to Temple Isle. Built up, both sides. Lots of nooks, gates. Easy to block off from the rest of the city.