The north London derby is always a fiery, no-holds-barred affair as Arsenal and Tottenham renew hostilities but you do not expect to see the children chosen as matchday mascots to go at each other.In what can be considered a first in the tunnel bust-up genre, a solitary Arsenal mascot took exception to his Spurs counterparts, caught up in the joy of the occasion, as they looked to high five passing Arsenal players as they came off the pitch following their pre-match warm ups.