you can fake this in ae if they’ve shot nothing;
at the end of the action, move your vision quickly to the left with a big fat horizontal fast blur. if u like, put another bit of vision in – following your first – it doesn’t matter what it is as you’re blurring it so much. repeat this if you like; depending on how long you want the whip pan to be…
then bring in your next clip from the right, fast blurred as well, and settle it centre of screen, keyframing off your fast blur quickly.