I have two, actually. Not sure if they're from the same movie or not. The first one involves a woman standing on a ladder which is in the hallway on the second floor, by the balcony. Someone (perhaps a child) pushes her off the ladder and she goes flying over the railing and hits the ground and dies. I thought that perhaps it was the scene in THE OMEN but it isn't. This is from a different movie.
The second trauma I have involves a birthday cake. I don't remember if it was a woman or a child, but just before or right after they blow the candles out, some sort of creature pops up from the cake and lets out some sort of ghastly scream. For a long time I was leery of birthday cakes because of this scene. Hope you can help!
UPDATE: The "Bad Birthday" trauma stems from the 1983 PETER WELLER classic OF UNKNOWN ORIGIN. Special thanks to reader jaakko, and check the comments for a clip.
It's a longshot on the second one, but there was a scene like that in "Young Doctors in Love".
I haven't seen the whole movie, but might it be Cathy's Curse?
It's a total guess….
I think the second trauma might be from the 1983 film Of Unknown Origin. The movie is about a big rat harassing Peter Weller, and in one dream sequence the rat bursts out of his kid's birthday cake.
Reader Dan P. confirms jaakko's guess:
did the movie with the woman falling off a ladder involve an iguana as well? i vaguely remember a movie about an iguana killing people.