Freidian slip? What I said at work

Man, you know your tired when you can't help what comes out of your mouth sometimes. A customer comes in today for me to check a "whining" sound from her PT Cruiser. I'm cleaning off my hands on a shop rag while I'm walking to her car and ... What I MEANT to say was: Let's take a look. What was going throught my mind was: Let's take a look AND Let's have a peek.
I ended up saying: "Let's take a leak". I just stopped and laughed hard. She looked at me and said: " I wasn't going to say anything cause I wasn't sure WHAT you meant." I explained what I wanted to say and what I was thinking when I said it. We ended up having a real good hearty laugh. Man- that could have went real bad!
Just goes to say that sleep deprivation does weird things to your vocabulary/ sentence structure!:sign6: