Spider's Webb and Snail Trail

It's another lazy day at home. Apart from a driving lesson where I had to learn how to go round roundabouts which was a bit scary...

I found this cobweb in my garden that looks like it has a snal trail on it. No idea how it would have got there. It's hard to imagine a spider's web holding the weight of a snail.

Although, cobwebs are supposed to be stronger than steel. Apparently.