diff --git a/src/cvars.cpp b/src/cvars.cpp
index 83c360eb2a7a4487ac9f0fd2d982cdc6e072b8bf..d092a322b5ef413d39aa196db684f687021fe505 100644
--- a/src/cvars.cpp
+++ b/src/cvars.cpp
@@ -860,7 +860,7 @@ consvar_t cv_ufo_health = OnlineCheat("ufo_health", "-1").min_max(-1, 100).descr
 consvar_t cv_botscanvote = ServerCheat("botscanvote", "No").yes_no();
 
 void Gravity_OnChange(void);
-consvar_t cv_gravity = ServerCheat("gravity", "0.8").floating_point().onchange(Gravity_OnChange).description("Change the default gravity"); // change DEFAULT_GRAVITY if you change this
+consvar_t cv_gravity = ServerCheat("gravity", "0.8").floating_point().min_max(0, 200*FRACUNIT).onchange(Gravity_OnChange).description("Change the default gravity"); // change DEFAULT_GRAVITY if you change this
 
 consvar_t cv_kartdebugcolorize = ServerCheat("debugcolorize", "Off").on_off().description("Show all colorized options on the HUD");
 consvar_t cv_kartdebugdirector = ServerCheat("debugdirector", "Off").on_off().description("Show director AI on the HUD");
diff --git a/src/k_menufunc.c b/src/k_menufunc.c
index 624625dab50a5f93899c773aa90fcaa99d41b479..16d25583895e68a27518b2f499b4e07182fb32a7 100644
--- a/src/k_menufunc.c
+++ b/src/k_menufunc.c
@@ -88,6 +88,9 @@ static void M_AddFloatVar(consvar_t *cv, fixed_t step)
 
 	const CV_PossibleValue_t *values = cv->PossibleValue;
 
+	if (values == NULL) //cvar is unbounded and will not work! return is here only as a failsafe to prevent crashes
+		return;
+
 	for (i = 0; values[i].strvalue; ++i)
 	{
 		if (cv->value == values[i].value)
@@ -220,7 +223,7 @@ static void M_ChangeCvar(INT32 choice)
 			"Turning on Auto Roulette",
 			"\"Ring Racers\" is not designed with random items in mind. With Auto Roulette, you cannot select the item results you want or select an item early."
 			"\n"
-			"You will be at a distinct \x85" "disadvantage. \x80\n" 
+			"You will be at a distinct \x85" "disadvantage. \x80\n"
 			"\n"
 			"ARE YOU SURE?",
 			M_ChangeCvarResponse,