my book says that you should approach it slowlyand talk to it soothingly. grab it quickly and firmly by the neck and,supporting the back, place the animal as quickly as possible in adarkened transport box, where it will feel safe and hidden. if therabbit screams in fear, wrap it in a blanket as you pick it up. or anypiece of clothing. to create a dark wrap ASAP and hold in your arm orlap.
keep it warm and make sure it gets absolute rest until viswibly calmed down again.
also, try to stay calm yourself so you dont frighten the poor guyanymore. if you are feeling calm it will be easier to show the rabbitthat everything is ok.
let us know if your bun bun is ok!!!