When a person puts on a red swimming cap they then become a Discount Smurf.
(IT HAS TO BE A RED ONE)
Person 1: Hey I forgot I had a red swimming cap in my bag haha!
Person 2: Give it to me
.
Person 1: Huh?
Person 2: Now.
Person 1: Okay then *Hands over red swimming cap*
Person 2: *Puts red swimming cap on* I am now a Discount Smurf.