Looking at this it's not even a neg really , it starts out as one but then becomes your own little in joke , gives you and your girl a bubble to work in .
Be careful though Vision as you seem to use it alot in your script up there . Use it once , at a stretch a second time but don't keep going back to it as it will look like this

Her 1st time ... funny , he's teasing me
Her 2nd time ... yup still funny , obviously still on it
3rd ... ok shut up about the shoes now
4th ... seriously , have you got nothing else to talk about ??

The beginning is good as a little tease so use it but then chill out on it and maybe use it when you call her after or in a cute text !

The problem with negs ... Some guys use one and find they get a good reaction but then unfortunately they then go overboard as if it made her laugh the first time ... it must make her laugh 100 x ... noo !

God im going back abit here but as Style said ... Use a neg like a pebble , throw it and carry on your fun exciting interaction

Hope that helps