In the middle of the night, he swore he saw a light through the hole.
"When I shone the light a little clearer through the hole, where he was, I could see this very animated face, " said Clark.
Its event horizon, the outer edge inside which not even light can escape from the black hole's gravitational pull, would be only about 7.5 million kilometres.
The conditions there approach the relentless, overwhelming power of a black hole, which swallows even light.
The Stadium of Light seemed to have become a black hole that sucked the creativity, inventiveness and composure out of any player who signed a Sunderland contract.
The researchers from the Max Planck Institute for Extraterrestrial Physics in Germany said the black hole was 27, 000 light years, or 158 thousand, million, million miles from the Earth.
The invitations had gone out, verbally, after many, many late-night Scotches at Elaine's eponymous watering hole, and in the light of day I was a tiny bit nervous about Elaine's acceptance.
Play was cut short on Friday because of bad light with Rose on the green at the 17th hole.
Evidence of past explosions is revealed in the image - huge lobes of 20-million-degree Celsius gas (the red loops in the image at approximately the 2 o'clock and 7 o'clock positions) that extend over dozens of light-years on either side of the black hole.
The memory hole feels like a dark cavern, but light that makes us close our eyes is darkness to us.
Sweden's Henrik Stenson was level with American Woody Austin with one hole left before play was suspended for the light and set to resume at 0800 BST on Friday.
Black holes are notoriously difficult to study, since so much in astronomy depends on the detection of light - and within a certain distance from a black hole, even that cannot escape.
The black holes are separated by an estimated distance of less than a third of a light-year - cheek-to-cheek by black hole standards and significantly closer than the postulated binary system spotted by the Chandra X-ray Observatory in 2003.
Instead, cut a hole in the bottom of the pumpkin for your candle or other light source.
One of the key discoveries in the black-hole story came from an analysis of just 150 photons (particles of light) that had spent 12 billion years traveling across the cosmos to us.
Conventional wisdom says the market has been pricing in massive quantitative easing since the Jackson Hole Fed retreat, and the upcoming announcement, if it comes in light of expectations, could trigger a strong sell-off.
Once the hole has been blasted open with hot water, a probe carrying an ultraviolet light will be lowered to sterilise its upper section.
This supermassive black hole lies at the center of galaxy NGC 1277, which is about 220 million light years away from Earth.
FORBES: Astronomers Find One Of The Biggest Supermassive Black Holes Yet
With a different hole design, crystal fibres can do the opposite trick as well, spreading the light much more evenly across the width of the fibre and thereby reducing non-linear effects.
We're nowhere near the top of the hole, but we are scrambling up the side now, and we can sort of see light way up there.
Over the course of the next few hundred million years, the two black holes in NGC 6240, which are about 3, 000 light-years apart, will drift towards one another and merge to form an even larger supermassive black hole.
The black hole is located in a globular cluster associated with a galaxy named NGC 4472, some 55 million light-years away.
BBC: NEWS | Science/Nature | Black hole found in ancient lair
When this sort of star implodes, to create a black hole, it generates jets of material that punch their way out of the collapsing mass at near light-speed, to produce extremely high-energy emissions of light.
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