1.   I felt an irresistible impulse to giggle.

2.   And what it tends to prove is that it was not an uncontrollable irresistible impulse to fire when he did.

3.   I have two perfectly nice cats of my own and that normally protects me from the otherwise irresistible impulse to make friends with any cat in my vicinity.

4.   On the other hand, maybe something in that Texas soil triggers an irresistible impulse to execute.