diff --git a/src/k_kart.c b/src/k_kart.c
index 2610de1f5..ae0ee30d1 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -6745,6 +6745,11 @@ static INT16 K_GetKartDriftValue(player_t *player, fixed_t countersteer)
 		basedrift += (basedrift / greasetics) * player->kartstuff[k_tiregrease];
 	}
 
+	if (player->mo->eflags & (MFE_UNDERWATER|MFE_TOUCHWATER))
+	{
+		countersteer = 3*countersteer/2;
+	}
+
 	return basedrift + (FixedMul(driftadjust * FRACUNIT, countersteer) / FRACUNIT);
 }
 
@@ -6780,6 +6785,11 @@ INT16 K_GetKartTurnValue(player_t *player, INT16 turnvalue)
 		turnvalue = 5*turnvalue/4;
 	}
 
+	if (player->mo->eflags & (MFE_UNDERWATER|MFE_TOUCHWATER))
+	{
+		turnvalue = 3*turnvalue/2;
+	}
+
 	turnvalue = FixedMul(turnvalue * FRACUNIT, weightadjust) / FRACUNIT; // Weight has a small effect on turning
 
 	return turnvalue;
@@ -7900,6 +7910,9 @@ void K_MoveKartPlayer(player_t *player, boolean onground)
 		if (G_BattleGametype() && player->kartstuff[k_bumper] <= 0)
 			player->mo->friction += 1228;
 
+		if (player->mo->eflags & (MFE_UNDERWATER|MFE_TOUCHWATER))
+			player->mo->friction += 614;
+
 		// Wipeout slowdown
 		if (player->kartstuff[k_spinouttimer] && player->kartstuff[k_wipeoutslow])
 		{
diff --git a/src/p_mobj.c b/src/p_mobj.c
index a628c8325..d42a1bf9b 100644
--- a/src/p_mobj.c
+++ b/src/p_mobj.c
@@ -1248,29 +1248,45 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
 	}
 
 	// Less gravity underwater.
-	if (mo->eflags & MFE_UNDERWATER && !goopgravity)
-		gravityadd = gravityadd/3;
+	if ((mo->eflags & MFE_UNDERWATER) && !goopgravity)
+	{
+		if (mo->momz * P_MobjFlip(mo) <= 0)
+		{
+			gravityadd = 4*gravityadd/3;
+		}
+		else
+		{
+			gravityadd = gravityadd/3;
+		}
+	}
 
 	if (mo->player)
 	{
-		//if ((mo->player->pflags & PF_GLIDING)
-		//|| (mo->player->charability == CA_FLY && (mo->player->powers[pw_tailsfly]
-		//	|| (mo->state >= &states[S_PLAY_SPC1] && mo->state <= &states[S_PLAY_SPC4]))))
-		//	gravityadd = gravityadd/3; // less gravity while flying/gliding
 		if (mo->player->climbing || (mo->player->pflags & PF_NIGHTSMODE))
+		{
 			return 0;
+		}
 
 		if (!(mo->flags2 & MF2_OBJECTFLIP) != !(mo->player->powers[pw_gravityboots])) // negated to turn numeric into bool - would be double negated, but not needed if both would be
 		{
 			gravityadd = -gravityadd;
 			mo->eflags ^= MFE_VERTICALFLIP;
 		}
+
 		if (wasflip == !(mo->eflags & MFE_VERTICALFLIP)) // note!! == ! is not equivalent to != here - turns numeric into bool this way
+		{
 			P_PlayerFlip(mo);
+		}
+
 		if (mo->player->kartstuff[k_pogospring])
+		{
 			gravityadd = (5*gravityadd)/2;
+		}
+
 		if (mo->player->kartstuff[k_waterskip])
+		{
 			gravityadd = (4*gravityadd)/3;
+		}
 	}
 	else
 	{
@@ -1278,10 +1294,15 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
 		if (mo->flags2 & MF2_OBJECTFLIP)
 		{
 			mo->eflags |= MFE_VERTICALFLIP;
+
 			if (mo->z + mo->height >= mo->ceilingz)
+			{
 				gravityadd = 0;
+			}
 			else if (gravityadd < 0) // Don't sink, only rise up
-				gravityadd *= -1;
+			{
+				gravityadd = -gravityadd;
+			}
 		}
 		else //Otherwise, sort through the other exceptions.
 		{
@@ -1316,7 +1337,7 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
 					}
 					break;
 				case MT_WATERDROP:
-					gravityadd >>= 1;
+					gravityadd /= 2;
 					break;
 				case MT_BANANA:
 				case MT_EGGMANITEM:
@@ -1341,7 +1362,9 @@ fixed_t P_GetMobjGravity(mobj_t *mo)
 
 	// Goop has slower, reversed gravity
 	if (goopgravity)
+	{
 		gravityadd = -gravityadd/5;
+	}
 
 	gravityadd = FixedMul(gravityadd, mo->scale);