It was strange to see a pool of custard in someone’s backyard. Instinct told Jack to go round it to get to the red button placed on the other end. The gamemaster had other plans and told him to find out another way. Jack turned to Ianto.
“So what’s our move?”
“Take off your shoes?”
“What? Why?” Jack asked a little confused.
“Just trust me, you can walk on custard.” Jack gave him a look, “Custard is a non-Newtonian liquid.”
“Which means?”
“Oh you’ll find out.”
Jack reached the other side and pressed the button
Ianto smiled
Thank you Brainiac
To see Man walk on custard,
here is the segment from Brainiac