I'm going to spill water on my friend's macbook
Why are you going to spill water on his laptop?
I'm pissed off, I lost my job three weeks ago
Being angry about losing your job is understandable. But taking it out on your friends expensive computer isn't acceptable. Work through your anger by talking it out.
Way to be a buzzkill, talking to you is boring.
If you have no job how do you expect to pay to replace the item? He could call the police and you could be arrested making it even harder to find a job.