This slip up doesn't make sense. I haven't seen this movie for a while so I don't remember the scene. BUT...
Why would dropping a glass break a table (assuming the glass is the type that you drink out of)? And then if it did break the table, how could you drop the glass from too high above it. If by dropping the glass, the table did break, then the slip up should read something like "the glass was not dropped high enough to break the table". That is unless the glass was made of lead, the table was at street level and the scene took place on top of the Empire State building?
Anyway, people should reread what they submit to make sure that it makes sense, otherwise the slip up is, in its self, a slip up.
Tommo is right. Its a joke - might not happen in real life. But I know that I wouldn't try it on my own table.
My take on this is that if the glass that he dropped appeared to be several inches above the table when dropped. I believe that it could have broken the glass table - especially if it was one of those real heavy glasses.
Not really a slip up, I worked in a bar and I have broken glass shelves from simply picking them up, placing bottles on them, and even putting bottle openers on them, all you need to do is catch it wrong, and it can break, Nick was just unlucky.