高到天上：數字、心情、高度
核心畫面直接使用：某個東西被推到遠遠超過一般人預期的位置。
adjective · B2
Extremely high — used about prices, costs, rents and other numbers, about feelings such as hope or confidence, and sometimes about how tall something really is.
高得嚇人
核心畫面
Think of something leaving the ground and not stopping where you expected. A price climbs, and climbs, until you look up and it is all the way at the sky. That is the whole picture, and the word simply puts sky and high together to give it to you. It works for anything a person can measure with their feelings: rent, ticket prices, confidence, hopes, sometimes the height of a pair of heels. And when the expression blow something sky-high is used, the same upward picture is taken literally - the thing does not merely break, it goes up.
可以想成有東西離開地面，而且沒有停在你以為的地方。價錢一直往上爬，爬到你抬頭一看，它已經到天上了。整個字就是這個畫面…更多收起
可以想成有東西離開地面，而且沒有停在你以為的地方。價錢一直往上爬，爬到你抬頭一看，它已經到天上了。整個字就是這個畫面，sky（天空）加 high（高）直接把它拼出來。凡是人會用感覺去衡量的東西，都可以套進來：房租、票價、信心、期待，偶爾也包括一雙高跟鞋的高度。而在 blow something sky-high 這個片語裡，同一個往上的畫面被照字面用了一次——東西不只是壞掉，是整個飛上去。From the word’s history
Wiktionary records the word as simply sky + high, which is exactly the picture the modern uses still rest on.
維基詞典把這個字記成 sky + high 的組合，也就是「高到天空那麼高」。今天不管是講價錢還是講信心，靠的都還是同一個畫面。
Wiktionary entry for sky-high (etymology_text: From sky + high), supplied in this evidence packet
Two branches
照字面往上飛：blow something sky-high
同一個「往上到天上」的畫面，只是這裡不是比喻。東西真的被炸開，碎片往上飛，所以「什麼都不剩」。
verb · C1
If an explosion blows something sky-high, it destroys it completely and throws the pieces up into the air.
炸得粉碎（炸上天）