or play them a screaming hgrunt sound:
SHUUT YOOOUR MOUUUTH!!!
no download needed.
Code:
spk "hgrunt/(p110) god! (p100) damn! (p120) shut! (p110) your! (p100) mouth!"
or
Code:
spk "hgrunt/(p120) shut! (p110) your! (p100) mouth!"
should be possible. try out.