Kasträsh can be used if someone is on the toilet and you can just scream "KASTRÄSH" and they have to come out even if they are in the middle of peeing.
Kastrosh can be used if someone is talking and you can just scream "KASTROSH" and they have to stop talking even if they are in the middle of a sentence.
Kastrysh can be used if someone hates snow and you can just scream "KASTRYSH" and they will get snow launched in their face at 220/mph so they can truly appreciate snow.