diff --git a/src/k_kart.c b/src/k_kart.c
index 3dbf0142c..a2d89e005 100644
--- a/src/k_kart.c
+++ b/src/k_kart.c
@@ -466,19 +466,32 @@ fixed_t K_GetKartGameSpeedScalar(SINT8 value)
 
 //{ SRB2kart p_user.c Stuff
 
+#define WORSTINVBUMPPOWER (FRACUNIT/14)
+
+#define INVBUMPBOTTLENECK (FRACUNIT - (WORSTINVBUMPPOWER))
+
 static fixed_t K_PlayerWeight(mobj_t *mobj, mobj_t *against)
 {
 	fixed_t weight = 5*FRACUNIT;
+	const boolean invinisalt = K_IsKartItemAlternate(KITEM_INVINCIBILITY);
 
 	if (!mobj->player)
 		return weight;
 
-	if (against && !P_MobjWasRemoved(against) && against->player
-		&& ((!P_PlayerInPain(against->player) && P_PlayerInPain(mobj->player)) // You're hurt
-		|| (K_GetShieldFromPlayer(against->player) == KSHIELD_BUBBLE // They have a Bubble Shield
-		&& K_GetShieldFromPlayer(mobj->player) != KSHIELD_BUBBLE))) // and you don't
+	if (against && !P_MobjWasRemoved(against) && against->player)
 	{
-		weight = 0; // This player does not cause any bump action
+		if ((!P_PlayerInPain(against->player) && P_PlayerInPain(mobj->player)) // You're hurt
+		|| (K_GetShieldFromPlayer(against->player) == KSHIELD_BUBBLE // They have a Bubble Shield
+		&& K_GetShieldFromPlayer(mobj->player) != KSHIELD_BUBBLE)) // and you don't
+		{
+			weight = 0; // This player does not cause any bump action
+		}
+		else if (invinisalt && against->player->invincibilitytimer)
+		{
+			// Scale Alt. Invin. weight to their power. At full power, you get shoved off!
+			// Might cause less shitty-feeling bumpcheck moments.
+			weight = max(0, FRACUNIT - FixedMul((against->player->kartweight) * FRACUNIT, K_InvincibilityGradient(against->player->invincibilitytimer)));
+		}
 	}
 	else
 	{
@@ -488,7 +501,20 @@ static fixed_t K_PlayerWeight(mobj_t *mobj, mobj_t *against)
 
 		weight = (mobj->player->kartweight) * FRACUNIT;
 
-		if (K_GetShieldFromPlayer(mobj->player) == KSHIELD_BUBBLE && mobj->player->bubblecool == 0)
+		if (invinisalt && mobj->player->invincibilitytimer)
+		{
+			// Cap the gradient at 1.0 to prevent exaggerated nonsense.
+			fixed_t mygradient = min(FRACUNIT, K_InvincibilityGradient(mobj->player->invincibilitytimer));
+
+			// Scale Alt. Invin. weight to your power. At full power, they get shoved off!
+			// Might cause less shitty-feeling bumpcheck moments.
+			weight = FixedMul(weight, mygradient);
+
+			// Like the Bubble Shield, nerf bumps a good bit to make them feel less ridiculous.
+			// As your power depletes, this nerf gets less necessary, so scale it to match.
+			weight = FixedMul(weight, FRACUNIT - FixedMul(INVBUMPBOTTLENECK, mygradient));
+		}
+		else if (K_GetShieldFromPlayer(mobj->player) == KSHIELD_BUBBLE && mobj->player->bubblecool == 0)
 		{
 			weight = max(BUBBLEMINWEIGHT, weight);
 			weight = FixedMul(weight, FRACUNIT/16);
@@ -501,6 +527,9 @@ static fixed_t K_PlayerWeight(mobj_t *mobj, mobj_t *against)
 	return weight;
 }
 
+#undef INVBUMPBOTTLENECK
+#undef WORSTINVBUMPPOWER
+
 fixed_t K_GetMobjWeight(mobj_t *mobj, mobj_t *against)
 {
 	fixed_t weight = 5*FRACUNIT;