Khan ended up on the trajectory of four punches that forced him to cross his arms and activate the [Blood Shield]. He had managed to take one of Lieutenant Pouille's opponents by surprise, but his sneak attack had revealed his position, allowing one of the Stal around the group to target him.
The impact with the four punches flung Khan back. He didn't have the time to plant his feet on the ground, so the attack pushed him in the trajectory of the Stal that Lieutenant Pouille had just killed. The alien fell on him, forcing his momentum to an end.
The Stal that the Lieutenant had previously pushed away had noticed Khan's actions. An angry growl came out of its two heads as it decided to deal with the impaired human before turning toward its other opponent. The same went for the aliens that had gathered around the group since Khan now stood in the open.