The Pitcher's Mitt's one-step gravity

Verified against the spelunky.ai port v0.1.10 on 28 October 2026.

The Pitcher's Mitt throws harder and lighter: 6 pixels a step faster, with a sixth of the usual gravity. Most items forget the lighter gravity a step later. A Jar, a Skull or a die never does, and floats for the rest of its life. An arrow's own light gravity goes the same way as most items' Mitt gravity.

Wearing a Pitcher's Mitt, the player throws a Rock straight ahead: it drops to the floor within a few steps and stops short. He throws a Jar the same way: it keeps the Mitt's light gravity and flies flat across the room ^[1].

A throw from the hands with the Mitt, not crouching, speeds the item up and sets its gravity, myGrav, to 0.1:

            if (global.hasMitt and not scrPlayerIsDucking())
            {
                if (holdItem.xVel < 0) holdItem.xVel -= 6;
                else holdItem.xVel += 6;
            
                if (not kUp and not kDown) holdItem.yVel = -0.4;
                else if (kDown) holdItem.yVel = 6;
                
                holdItem.myGrav = 0.1;
            }

But the step most items run (oItem's) sets myGrav back to 0.6 on every step the item isn't in lava, after that step's gravity is added:

        if (collision_rectangle(x-3, y-3, x+3, y+3, oLava, 0, 0))
        {
            myGrav = 0;
            xVel = 0;
            yVel = 0;
            y += 0.05;
        }
        else
        {
            myGrav = 0.6;
        }

So a Rock falls at 0.1 for one step and at 0.6 from the next. A Jar, a Skull and a die run steps of their own instead, which set myGrav only in lava, and they keep the 0.1 for good ^{[2] [3] [4] [5]}. Monsters and the Damsel set their gravity on every step too, and lose it within a step ^{[6] [7] [8] [9]}. An arrow is made with a gravity of 0.2 ^[10], but its step runs oItem's first ^[11], so every arrow, a Bow's or an Arrow Trap's, falls at 0.2 for one step and at 0.6 after ^[12].

Wear the Mitt and throw anything level from the ground: a Rock lands sooner than it would without it. Throw a Jar or a Skull the same way to see it float, or a die in the Dice House. The replay of the clip's staged scene, on a custom level, throws a Rock that falls at 0.1 for one step and 0.6 from the next, and is on the floor 4 steps after it leaves the hands; then a Jar, which still has 0.1 after it lands ^[13].

The spelunky.ai port reproduces it exactly: it's in docs/quirks.md's list of the 1.1 source's bugs ^[12], and the oracle's fingerprint of the replay pins both items' falls. No option turns it off.