Awesome catch; that would be bad if it breaks under power.
You caught it at exactly the right time; it's stronger after the first yield, but much, much more fragile.
Cut a section out of the broken area, polish it, and hit it with a mild nitric acid solution; that will bring up the grain so you can see it easily.
Vinegar will work in a pinch, but it won't look as good.
(Torn metal looks like a sponge under the microscope, if you've never seen it.)
It's amazing how much energy it takes to do that.
TM, I'd make that a desk ornament, considering your career.
"This is what it looks like just before
Red '96 Cougar XR-7 240k mi. '02 4R70W, PST DS : '03 PI engine, 04 maf, 24lb injectors, 2.5" exhaust, '02 4r70w + Jmod, DirtyD0g TC + cooler + 3/8" lines, 255 walbro fp. Alpine system.
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