Kara: So, J'onn says to head straight back to the DEO, and if we scratch his car, he'll put us in containment.
Alex: Well, you'd better let me drive, then.
Kara: Why? I'm a great driver.
Alex: You almost killed us twice coming up here.
Kara: That possum came from nowhere.
As they are fleeing the alien base, Supergirl and the others run towards the portal, Winn activates it and jumps through. In a following shot (after a 'friendly' alien helps them), he is standing behind Supergirl again.
At the bar Kara throws the peanuts against the bottles in exactly the same way Superman did in Superman 3.