I really hope you don't have a frontal shot... I really don't want to know why they are called the "slugs".
As to the question in the OP... Did you also know that you can used this beer trick to catch Earwigs? Those are nasty looking buggers. Sadly they don't sing when they get into the beer. Rather, they thrash about madly injuring all in their way, often bumping into the cheery slugs, ruining their evening of frivolity.
Sad. Sad indeed.
Here are some slugs that managed to avoid those nasty earwigs... if you listen closely you can hear, Marvin Gaye's Let's Get it On playing in the background.
