I've gotten a few questions about multiple running times for THE BUBBLE listed in books and on-line. Supposedly, the film is either 112 or 94 minutes in length.
We have a 35mm print of the 1972 Sherpix re-issue and it is 91 minutes.
The 94 minute length (actually 93:29) is from the 1976 Monarch Releasing Corp. re-issue. They added a 2:29 montage after the end credits reprising the best off-screen effects.
Unfortunately, many people believe IMDB to be 100% accurate. I can tell you from my experience with the early aspect ratios that there is a LOT of wrong information on that site.
Sadly, the trims are long gone. We searched and can find no trace of them.