De-railed

I dunno why I called this de-railed, I guess the hand rails?
I've been up very early and out very early,
It was raining heavy, which was fab as I hid under my umbrella.
Now of course the sun is out and I am indoors.
But I do need to scamper to my local post office soon to post a parcel for my niece and nephew.
Yeah check me out, super aunt taaa daaaa
whaaaat?? I dunno???
Ah I see, I must be the de-railed :/