The WORST time to cum?

on a bus

When your parent caught you masturbating.

Seriously, I can't think of anything else worse.

Except when your boss caught you masturbating...

What do you mean? You gotta finish like a boss.

When your parent IS the boss?

OT: in the middle of class when you have to go up to the blackboard to answer a question.
Or...
In your best friends wife.
At their wedding.
After you realize its actually him in the wedding dress.

Sorry, but unfortunately, I fell victim to this.

I love you.

Edit:

When your boss trips a wire while opening a door that sets off a shotgun meant to kill him, in a motel room next to yours and the noise rings out so loud that you cum just as your tied up whore gets free.

Edit: Edit:

(Happened to me)

When your sister walks in and trips on a towel, crushing your nut and receiving an eye of the sticky.

When your pet dog or cat jump on the bed.

When you accidentally pull of the plug of your laptop.

LOL the worst time to cum, for me, would be when I'm deep inside a girl, without a condom, and no other form of protection. Thankfully that has never happened, but it's the prime horror scenario lol.

When your mum looks at you.

When you're finally about to lose your virginity with the girl that you have been hopelessly in love with for years.

While defusing an armed time bomb...*countdown from 24 begins* !!!

At your funeral...

Whenever its not in her butt.

Caught in the act, cheating.