That is a TriStar, not a 747.
I have it on good authority that those Tristars can suck a 200 pound 12 ft aluminum work stand from the wingtip and process it through the #3 engine during a 100& power runup.
I wasn’t there, but understood the engine was still making some power after the “racket” and had to be shut down, it didn’t flame out.
On teardown, there were only stubs left in the turbine section.