As soon as he had confirmation of the culprit, his smile somehow became that much brighter. The Doctor had a healthy respect for pranks, though he didn't play them, hadn't, really, since his days on Gallifrey. Before he had to look into the confounding Schism, long before he lost the Master to his madness, they had been a couple of terrors.
Pranks didn't sour his disposition as a reminder of what he'd lost, but what he'd gotten to treasure.
Clambering back to his feet, he practically bounded over to Wanda and held his arms open. "Hello!" He greeted ever so fondly. "That was brilliant, classic! I've got to hug you. Is that alright?"