It ' s called sonoluminescence . Technically not explosion , just a collapsing cavity The cavity is caused by supercavitation <| sep |> How does your friends hand look now ? Did it ever heal completely or does it look really messed up ? <| sep |> Man , Collinsworth laying down the feels . <| sep |> No prob ! I actually graduated from Calvin which might seem strange since I ' m an atheist , but if I had thought the education was lacking in any way while I was studying there I would have transferred right away . What I got was a pretty well rounded education . The core classes are numerous and quite intense I counted 27 core classes alone that I had to take , on top of my major and minor . And while the religious undertones gave me headaches sometimes , we actually had a lot of deep discussions where I was able to state secular views , without any worry that I would receive any backlash from my professors . My biology professor started off each class with a prayer and a small bit from the Bible , but we had an entire unit on evolution , and intelligent design was only offered as an afterthought , not a serious theory . Even in my geology class which was one of the coolest classes I ever took we learned about how old the earth really is and my professor never even mentioned young earth creationist ideas or if he did I never noticed . I took classes on Buddhism and other East Asian religions and never once did the class dissolve into look how stupid this other religion is compared to the great Christianity . We had a Buddhist monk come visit us to have a friendly discussion , and my class even went to a local Buddhist temple to experience a full sermon even though it was in Vietnamese lolNot to mention that the school had an LGBTQ group that is active on campus , and a very active multicultural group . Every year there is a coming out day where supportive messages are written around campus for the LGBT students and discussions are had in class and in the dorms . There is also UnLearn week which focuses on unlearning racial stereotypes and bridging the gap between races and ethnicities . Basically what I ' m getting at is , even though it ' s run by Christians and teaches Christian ideas , Calvin is a damn good school , and even though it ' s thought as a white Dutch people ' s school there are a ton of international students and the school has been trying to make the campus more diverse and multicultural . It has its facepalm moments , but for the most part the students and staff are all progressive and nothing like this billionaire woman who will probably ruin American public education . Betsy DeVos is honestly a black mark against Calvin . The only good thing she and her family has done for it is donate loads of money so new facilities could be built .