魔术师取出两条丝巾，把它们放在一起打一个结，请一位女士帮忙，把这个结搭在自己上的领口上，检查一下确保没有掉下来。魔术师取出第三条丝巾，并且瞬间让它消失，并且宣称，可以重新出现在那两条打结的丝巾上。但当魔术师绕道观众的身后时，突然拉去搭在女士身上丝巾时，一件胸衣忽然出现在2条丝巾中间！绝对的令人惊讶、搞笑魔术。

Baffling Bra

Hilarious effect for adult audiences! (This is one of those effects that is meant for a very specific audience and occasion. It is NOT SUITABLE for children, please.)

Ask for a male volunteer from your audience. Two handkerchiefs are tied together, the knot is tucked (discreetly and tastefully) into the front of the volunteer's shirt, and you and your volunteer each hold the tip of a handkerchief. You tell your audience that, on the count of three, you and your volunteer are going to pull on the handkerchiefs, making them pass right through the volunteer's body without harming him a bit. But when you each pull on a handkerchief, a BRASSIERE appears, tied between the handkerchiefs! It's a silly surprise that will make everyone laugh, including your volunteer!

This trick is also funny if you use it on yourself. For example, you could pretend to have trouble handling the tied silks plus other items, and so you tuck the silks into your shirt to get them out of the way while you do something else. When you take the silks out of your shirt, the bra will be seen tied between them.

This trick is also called 20th Century Bra.
 
You'll get everything you need:
two handkerchiefs
brassiere
printed instructions
Handkerchiefs measure 27" diagonally.

Demo: https://youtu.be/wifHvjfJkYA