===================================================================
--- original.js
+++ change.js
@@ -10,9 +10,9 @@
 var Athlete = Container.expand(function (line) {
 	var self = Container.call(this);
 	self.speedX = -1 * globalSpeedPerLine[line];
 	self.nextHurdleSpeedX = 0;
-	self.jumpSpeed = -17;
+	self.jumpSpeed = -22; // -17;
 	self.lastJumpTime = 0;
 	self.interJumpDelayMs = 500;
 	self.gravity = 0.5;
 	self.lineIndex = line;
@@ -123,8 +123,10 @@
 		if (self.isAi) {
 			// AI Athlete
 			var nextX = self.x;
 			self.previousX = self.x;
+			var deltaSpeed = Math.abs(globalSpeedPerLine[self.lineIndex]) - Math.abs(globalSpeedPerLine[0]);
+			nextX += deltaSpeed;
 			if (!self.isFalling) {
 				// Normal running
 				if (self.isOnGround) {
 					// Running
@@ -137,18 +139,22 @@
 					// Auto jump first hurdle of the line
 					if (obstacles[self.lineIndex].length) {
 						var distance = obstacles[self.lineIndex][0].x - nextX;
 						if (self.lineIndex == 3) {
-							log((self.isOnGround ? 'On ground' : 'In air') + " / y=" + self.y + " / DeltaY=" + (obstacles[self.lineIndex][0].centralRod.y - self.y) + " / distance=" + distance);
+							log((self.isOnGround ? 'On ground' : 'In air') + " / y=" + self.y + " / DeltaY=" + (obstacles[self.lineIndex][0].y - obstacles[self.lineIndex][0].centralRod.y - self.y) + " / distance=" + distance);
 						}
-						if (distance > 0 && distance <= 250) {
+						if (distance > 0 && distance <= 300) {
 							self.jump();
 						} else if (distance > 1000) {
 							// When hurdle is far, apply inter-hurdle randomness
 							nextX += self.nextHurdleSpeedX;
 						}
 					}
 				} else {
+					var distance = obstacles[self.lineIndex][0].x - nextX;
+					if (self.lineIndex == 3) {
+						log((self.isOnGround ? 'On ground' : 'In air') + " / y=" + self.y + " / DeltaY=" + (obstacles[self.lineIndex][0].y - obstacles[self.lineIndex][0].centralRod.y - self.y) + " / distance=" + distance);
+					}
 					// Jumping
 					self.speedY += self.gravity * Math.abs(globalSpeedPerLine[self.lineIndex] / 10);
 					self.y += self.speedY * Math.abs(globalSpeedPerLine[self.lineIndex] / 10);
 					if (self.y >= linesGroundLevels[self.lineIndex]) {
@@ -157,9 +163,10 @@
 						self.speedY = 0;
 						self.y = linesGroundLevels[self.lineIndex];
 						// Define speed for next hurdle
 						var difficultyLevel = 1; // TODO : Move to global
-						self.nextHurdleSpeedX = -3 + difficultyLevel * 3 * Math.random();
+						self.nextHurdleSpeedX = -8 + difficultyLevel * 4 * Math.random();
+						//self.nextHurdleSpeedX = 0;// TEMP DEBUG
 					} else {
 						self.jumpAnim();
 					}
 				}
@@ -205,14 +212,14 @@
 				}
 			} else {
 				// Falling
 				self.y += 5;
-				if (self.y >= linesGroundLevels[self.lineIndex]) {
+				self.fallAnim();
+				if (self.y >= linesGroundLevels[self.lineIndex] + 200) {
+					// 200 for horizontal trunk offset
 					self.isOnGround = true;
 					self.speedY = 0;
-					self.y = linesGroundLevels[self.lineIndex];
-				} else {
-					self.fallAnim();
+					self.y = linesGroundLevels[self.lineIndex] + 200;
 				}
 			}
 		}
 		self.updatePosture();
@@ -220,10 +227,9 @@
 	self.jump = function () {
 		if (Date.now() - self.lastJumpTime > self.interJumpDelayMs) {
 			if (self.isOnGround) {
 				self.isOnGround = false;
-				var deltaSpeed = globalSpeedPerLine[self.lineIndex] - globalSpeedPerLine[0];
-				self.speedY = self.jumpSpeed - deltaSpeed;
+				self.speedY = self.jumpSpeed;
 				self.lastJumpTime = Date.now();
 				//globalSpeedPerLine[self.lineIndex] = globalSpeedPerLine[self.lineIndex] * 1.1;
 				if (self.lineIndex == 3) {
 					log("--------------- JUMP -------------------- speedY :" + self.speedY);
@@ -451,9 +457,9 @@
 var numberOfLines = 1 + numberOfOpponents;
 var numberOfObstacles = 20; // Total number of hurdles
 var obstacles = [[]];
 var obstacleSpawnTicker = 0;
-var obstacleSpawnDistanceRate = 1.5; // Ratio of screen width between obstacles
+var obstacleSpawnDistanceRate = 2; //1.5; // Ratio of screen width between obstacles
 var obstacleJustPassed = false;
 var finishLine;
 var stadium;
 var stadiumOdd;