Sorry for trouble to all concerned ....
No need to be sorry mate. The fact that you posted this, shows that you appreciate the safety concerns. It's what forums are best at.
You can appreciate that the amount of energy required to kill, or seriously stun a rat (and these can get quite huge), is well enough to fry or even kill a human !!!
It is likely you will find drawings or similar on www somewhere, BUT I'd always check with someone more knowledgeable before attempting them.
After all, you don't want the rats standing over your limp body, laughing ... That would suck ! :-)