Find somewhere comfortable to sit. Make yourself a drink, if so doing lies within your power.
Close your eyes.
And call to mind somebody you know. Ideally, not too well. Perhaps a work colleague ... your landlord ... the gentleman who runs the fine shoe emporium in your town ... a former schoolteacher ...
Now, imagine this person walking along, in earnest conversation.
Really imagine this.
… Now (with a casual flick of your mind) make 'em trip over.
Hours of fun, my friends. Hours of fun.