Other mistake: When Michael J. Fox is in the pool with Auntie Vera, she pulls off his shorts, however you can clearly see the flesh-coloured pants he has on underneath.
Other mistake: When the executive team are jogging on top of the of sky rise, the last shot shows the building is in a horrible state of ruin. All the windows are broken out and it is definitely not the building Pemrose Corp was shown as throughout the movie.
Suggested correction: Windows are not blown out, and the building is not in any state of ruin. You are just seeing items on the window ledges on the inside.