Stopped by the police

I got stopped by the cops on my way home last night.

'Do you know why we stopped you, Sir?'

'Yeah. I was weaving all over the road.'

'How much have you had to drink tonight, Sir?'

'Oh, nothing.'

'So why were you weaving all over the road, then?'

'I live round here.

Spoiler:

I was just avoiding the potholes.'