when i can find the reference where i saw it i will send you the link. but it states the pilots would flip the tanks over with near misses from bombs. the video i showed show that its possible to move a tank and i bet those IED's arent near the powerful of the 500lb bombs.. the abrams is 63 tons and it must have been tossed 10 -15 feet in the air with ease.
First, the Stryker is a 20 ton vehicle, and not relevant to the discussion. Second, the M1 clip shows an IED that was buried under the road, and if it follows the typical IED they would use on tanks, its probably 10-20 chained artillery rounds which puts it way past a 500 lb bomb in explosive force, not to mention it was buried. Putting the explosives underneath changes the characteristics of the blast effect. Bombs, unless they have delay fuzes, would not penetrate into the ground at all before detonating. Even with a typical short-delay fuze, they wouldn't penetrate that much. I've seen Mk83 dusters (duds) that hit and buried themselves, and you still have half the weapon sticking up above ground. The older 1,000 demo bombs were much less likely to penetrate even that much, since the nose of the weapon was very blunt, not to mention the slower velocity at which it came off the aircraft.
Now, I'm not saying that its impossible that a Tiger may have been flipped by a bomb, but in my experience of watching all 3 major Mk-series bombs (500, 1000, and 2000) dropped on M-48/M-60 hulks, I've never seen one flip the chassis completely over. Those were with quick fuzes. Perhaps a 2,000 lb bomb with some sort of delay fuze would have a chance, but it takes a lot of force to flip a 60 ton tank. I can't explain those photos and didn't try to earlier. I'm just telling you that given my experience with current stuff, this smells more like one of those WWII myths oft quoted. So, in a Mythbusters vein, I'll say plausible, but not likely.