Pulse Wave Puns

So my girlfriend and I went to a petting zoo over the weekend. We were wandering around and watched an encounter with a young boy (probably 2) and a chicken. The boy was was following the chicken around clucking and waving his arms, with his father close behind.

The chicken became curious and darted towards the little boy, with that he screams and runs behind his dad. Without missing a beat, the dad chimes 'Woah, easy there - don't get startled or I'll be chicken your wrist for a pulse'

We made eye contact and I gave him the chuckle he deserved.