What's going on with my bunnies?

Okay, I let my bunnies out to eat and run around in the kitchen. One of them looked a little sick and wasn't moving so I let him rest.But about a minute later one of the other bunnies started moving his ears but I didn't hear anything.He then started to slip and let his legs kind lay on the floor,after a bit he run into the wall,but even though he hit it he kept running and started twitching again.Then another bunny started twitching and sliding.I put some water on them and two of them got better the other one was still sliding around.After a while they were all better ,but they started going crazy again running in the same direction and now they're just sitting still or licking the ground and sliding.I don't understand how two of the other bunnies weren't affected though.Anyone know what's happening and what I can do ?