Sad clock?

I spawned a houndeye from HL1 in GMod, it shocked me or whatever it does, then there was some fuzzy/static noise, it shocked me again, and then a clock with a sad face popped up, after the clock disappeared, there was some random high and deep voices playing all at the same time, I think they were from HL1?

http://cloud.steampowered.com/ugc/595819536974169775/B33F3FEBA3C021FDB847706C6DFBD2D35FEB8EC8/

Where did you get the mod from?

What mod? You can use HL1: Source models and NPCs in GMod

Reinstall the game