Green worm crawling up my pants

I dont know where it came from but as I lay in bed I found this small green caterpillar worm slowly finding it's way up my pants. oh not from the inside, from the outside luckily. It reminds me of those Unif Green Tea worm imee jotai adverts on tv.



It looks pretty cute and soft, but it moves so slowly that it makes me wonder why it has so many legs for.