Continuity mistake: When the thugs crash against the cardboard boxes, the stuntman flies face down horizontally, yet a frame later he is flying upwards, as if ejected.
Continuity mistake: The chopper lights a bright laser light that reflects on Jack's forehead. When the crane behind appears, the light disappears, yet in the immediate close-up of Jack's face the beam reflection is still there.
Continuity mistake: Jack shoots at the elevator glass ceiling, but a frame later the remaining pieces have changed.
Continuity mistake: When Benedict pulls the corpse's finger, his watch is right next to the suit's sleeve. A frame later there's a 5 centimeter gap in between both.
Continuity mistake: Arnie tells Jack Slater, "Call my office," then there's a side angle of Arnie, and it is very obvious that it's not him but a stunt double.
Continuity mistake: During the shootout the baddie lying dead on the couch has his head turned to the left. A frame later it's facing the right side.
Revealing mistake: When Arnie is talking to himself as actor Jack Slater, right when he says "You're the best look-alike I've seen" his eyes are looking slightly sideways, away from Jack, and not where they should. Obviously Arnie was talking to an empty place but missed.
Continuity mistake: In the alleyway, the thugs' truck crashes against the boxes sideways, from a 7 O'clock position; yet a frame later it is crashing from a 9 O'clock position.
Continuity mistake: When Danny enters the theater for the preview, the wetness of his hair changes back and forth.
Continuity mistake: When Danny's mom is asking him why he missed school, the purse's strap on the table behind changes positions between shots.
Continuity mistake: When Danny suddenly appears inside Arnie's car, between the chase and explosions until they park the car, none of Danny's movements and positions match between the close-ups and the wide angles.
Visible crew/equipment: At the end when the projector starts by itself and lights are going crazy, in one of the windows of the projection room, a hand holding a light (making it move) can be seen. Look at the farthest left window.
Answer: Most likely, she was not a well-known enough actress to have name recognition like Arnold.
Brian Katcher