I will just leave a little reminder here, while it does not necessarily answer your question, you may find it to be useful. While some of the glitches aren't necessarily bad to use in the chat, many of them (including the glitch you are asking how to do) is considered spamming the chat and can get you in quite a bit of trouble if it's seen. Any glitches that underline words in the chat, write over other people's character names or messages in the chat, or space out that chat extensively are a few of the ones I would recommend steering clear of, since these can mess up the chat and clutter it up. Although I'm sure you have nothing but good intentions, I would be careful if you are considering using them in the chat.