Recently, Dinnerbone has released this image to introduce the new Minecraft weight mechanic. The more you weigh, the more momentum you have. He tested this by giving himself varying weight and standing on ice. Pretend the weight has 5 stages: Stage 1: You do not affect anything. Just like normal playstyle Stage 2: You are a smidge slower, and you put cracks in ice Stage 3: You are more slower and you put more cracks in ice Stage 4: You break the ice and you walk very slowly Stage 5: You break the ice, you move very slowly, and you cannot swim. He has released this information over time. Here is the hunger stats based on Fat Points (FP) The more the points, the more the weight you gain. Meat: 5 Cake, Cookie, Pie, and Bread: 7 Fruits and Veggies: 2 You can burn weight be running around and swimming. He plans to make this effect the elytra's flying capabilities soon. This is a pretty hefty update. This post was 100% a lie. The picture is real, it has nothing to do with weight.
On his twitter it said something about a new enchantment and that picture was included so i don't think that's the weight, i could have misunderstood it though.
Still, though: a well written post, and a quite believable one too! (like, about as believable as a good april fool's joke)
Actually, some sort of weight system wouldn't be that bad. Not like what was presented in the OP, though, but measuring the weight through items carried. For example, carrying an inventory full of feathers will weigh you down less than having an inventory of bricks. Just a thought.
It's a joke thread so it's not It would be in Minecraft discussion if it was real but it's fake so it makes more sense to be in Misc I suppose...