You want glitches?
MK1 is one of the glitchiest games in existence, although it helped me prove something: the PC version is an emulated arcade version.
Why? Because all the arcade glitches can more or less be performed on the PC version, including the palette crapout, but the crashes can't be reproduced.
For example, because of the way the hitboxes are setup, it's possible for Scorpion to do his teleport punch in place through 2 (possibly more, although it's already very difficult to do) moves: Scorpion's spear and Goro's fireball.
Basically, what you do is perform an extremely deep jump-in into those characters as they do the move, and teleport punch the instant you reach the ground. Against Goro, there's a bunch of weird stuff that happens afterwards; if you throw a spear, often a line of garbled dots appears in the middle of the screen for the duration of the attack. Against Scorpion it's even weirder; you often end up getting stuck inside the other Scorpion; if you try to move the other one moves with you and vice-versa. It's just really strange.
There's also some other strange glitches involving Shang Tsung and some of his old moves they seem to have removed from the game. Using Scorpion again, teleport punch often, and you can sometimes see Shang Tsung actually rushing towards your character, his fist raised. The second he touches you, the game crashes. If you time your teleport punches good enough, you can sometimes glitch out his transformation into Goro as well, getting Goro stuck in place while turning.
MK2 has it's share of AI peculiarities, too. For some reason, the AI plays differently if it's in the 1st or 2nd player spot. If you play in the 1st player spot, it'll almost never let you jump over it and will aggressively throw you. If you play in the 2nd player spot, it's a bit less aggressive, but will launch a TON more of their projectiles. If you're on the 2nd player side, you can also trigger a really weird AI glitch; if you jump towards it and it starts to walk backwards, if you keep advancing, it will just continue to retreat. What happens usually is that it will back itself up into a corner, and as long as you stay close to it it'll just keep on moving backwards, never attacking you. We used to do this glitch to practice our corner combos..