The Gunners were leading thanks to goals from Santi Cazorla and Tomas Rosicky when, with seven minutes remaining, Walcott made a cheeky 2-0 hand signal to the visiting fans.
The Spurs support struggled to see the humour and chose to respond with a hail of coins, as well as a lighter, a plastic cup and a bread bun.
It didn't bother Walcott, however, smiling ear to ear despite the irritation caused.
He then donned a scarf thrown to him by a member of the home support who were thrilled with their player's jibe.
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