Magic SysRQ
this is in german.
Source: https://wiki.ubuntuusers.de/Magic_SysRQ/
Here you can find the english explanation from good ol wikipedia
Source: https://en.wikipedia.org/wiki/Magic_SysRq_key
Depending on your hardware this can vary cause somne hardware vendors do their own thang :)
Hold Alt and Print keep them holdede. Then while still holding Alt and Print press one after another R + E + I + S + U + B here you can find two mnemonis
Raising Elephants Is So Utterly Boring
Reboot Even If System Utterly Broken
Not all Magic keys are enabled by default, check out this article for further reading in English
Alt + Print + O shuts your PC/Laptop down.
Alt + Print + K can be used as a substitute for donotzap i.e., CTRL+ALT+Backspace
https://linuxconfig.org/how-to-enable-all-sysrq-functions-on-linux