That's really asparagus! I have no idea what I'd do, other be glad I had some, somewhere in my garden. The 20 crowns we planted last year are missing presumed drowned
Yes, they can grow like a rocket if they want to. Yours is now at the ferny/flowering stage and you have to wait till October when it goes brown before you can cut it down - that is, if you are hoping for more asparagus next year! If not, cut it down now and go for the bin store.