A bunny's most famous body language move is the 'binky' โ a joyful jump and mid-air twist that's one of the clearest signs of happiness a rabbit can show. Flopping over dramatically onto their side, especially from an upright position, is another happy, relaxed behavior, not a sign of illness (though it can look alarming the first time you see it).
Thumping a hind foot loudly against the ground is a warning or alert signal, often in response to a perceived threat or something startling. Ears held upright and forward usually show alertness or curiosity, while ears flattened back against the body can mean fear or annoyance.
A relaxed bunny will often 'loaf' โ sitting with all four feet tucked under their body in a compact loaf shape โ which is a calm, content resting position. Nudging with the nose is often a request for attention or a gentle way of asking you to move.