Erica throws a cup of coffee at the wall in the college interviewer's office, getting some of it on the wall, which is never seen again.
Batman opened in June 1989. The narrator, though, states that it was "April 5th, 1980-something ".
While Barry is stumbling around the theater looking for Adam and Pops, he tips his soda cup towards the camera a couple times and it is obviously empty.
What are said to be Shrinky Dinks in the oven clearly aren't, much less Batman ones.
Penn State is a good 3 hour drive from Jenkintown. Erica would not have been able to return to the interviewers office in time to confront him in the parking garage.