Knitting casting off help please

[tessa89]

I cannot understand this instruction:
Cast Off Row: Slipping first stitch (OK) and working twice into next and every alternate stitch, cast off.

I am working on 2mm needles so everything is quite tricky, I cannot get my head around this instruction.

Would a video help? I can never remember how to do it so I follow this:

Violet, that's a video of a standard bind off, what the OP has to do is something quite odd. Is it the top of a sock? (I would guess so on 2mm needles). In which case I would just choose a very stretchy bind off - I like (although I knit through the back loops), , also very good for socks (esp with a rib top).

OP if you want to post a link to the pattern we may be able to help more. I'm intrigued!

I think Poltergoose has it.
I vaguely remember having a cast off like this at some point, it might have been a lace project. You knit into the front and back of the stitch then cast the first two stitches off, leaving you with one stitch on the right hand needle. Then repeat. I think.

It creates a kind of bobbled edge effect. If it's the cast off I'm recalling.