That's strange because I got caught in a gravity well of something I couldn't see (in-between two galactic arms), no stars to create a lensing effect. It dumped me out of supercruise and when I started it back up, I got the blue escape vector in front of me. There was nothing on the HUD for 10 seconds, then something popped up but I left in a hurry, just wanted to leave, now!
Damn! I figure you got used to usual encounters like the game provides, and all of a sudden something random like that happens, kind of scary!
I mean, stars themselves gigantic plasma balls are not something you want to get too close, and those neutron stars and white dwarf emitting huge blasts, but at least they are pretty obvious to see. So those very small almost invisible bodies yet about three times our sun mass have that surprise effect sometimes pretty incomfortable: first time I've visited one with my firend, far away from the main system star, it was fun and all, but then we left and navigated a bit around other bodies, and when coming back to the main star, I almost forgot about the BH I believed being behind me.
So this one not highlighted by my hud, accelerating more and more in SC, and then all of a sudden you start te see on your left stars circling and moving like hell, wondering if those are some planets or whatnot, just to realise you were passing by the BH again, that gave me the creeps.
We must have some sort of instinct stronger than rational thinking when approaching something like that.
And then, you pay attention to the dramatic soundtrack your ship plays around 'em in ED, like this very ancient body out of the newtonian comfort zone starts to exert its fascination on you, whispering "Come closer, child, closer...". That's Lovecraft stuff tricking your mind, and I'm pretty sure most humans would kind of freak out around certain objects in space because of them being so incommensurable for our poor salad hunters brains...