He or she then blows through the pipe so that the glass expands into a rounded bubble form.

VOA: special.2009.09.16

He ended up on a circus sideshow traveling through the country with the big steel pipe that went through his head.

最终,在一个全国巡游的马戏团里,大钢管打烂了他的脑袋,结束了他的生命

耶鲁公开课 - 心理学导论课程节选

Due to an explosion, a metal pipe went through his head like so.

由于一场爆炸,一根钢管刺穿了他的脑袋,就像这样

耶鲁公开课 - 心理学导论课程节选