The teacher tried to get it off with a wash cloth, and it left a red mark on the side of his face.
Helping one blond girl wash her hands, she notes in alarm a bright red mark on her face, what appears to be a fresh injury.
"I've been bitten so much I'm used to it, " said Leung, rolling up the sleeve of his oversized blue fleece jacket to reveal a red mark on his hand.
He received a straight red from Mark Halsey, with the referee deeming the incident to be serious foul play.
"I'm running out of patience sticking up for this sport, " sighed Red Bull driver Mark Webber.
Vettel's Red Bull teammate Mark Webber was fourth with former world champion Kimi Raikkonen fifth for Lotus.
Ferrari's Felipe Massa was third with the Red Bull of Mark Webber fourth.
BBC: Sebastian Vettel pips Fernando Alonso to German F1 pole
His Red Bull teammate Mark Webber was third fastest in second practice, with just 0.083 seconds separating the top three.
Others like the Australian Red Bull driver Mark Webber cycle it.
Red Bull driver Mark Webber has hinted that the ban on the off-throttle blowing of diffusers from the British Grand Prix next weekend could actually benefit his team.
Red Bull driver Mark Webber, another director of the GDPA, played down talk of a strike at Silverstone, but confirmed that they were taking the issue very seriously.
The new layout was met with a generally positive response from those at the circuit including Red Bull driver Mark Webber and his former team-mate, now a BBC pundit, David Coulthard.
The Englishman took solace in the fact that despite his poor result he still extended his lead over the Red Bull drivers Mark Webber and Sebastian Vettel, who had an even worse weekend.
If the race finishes as it starts then third place will be enough for McLaren's Lewis Hamilton to hang on to his lead in the title race (124 pts) from the two Red Bulls of Mark Webber (121 pts) and pole-sitter Sebastian Vettel (115pts).
Hues of red and yellow will mark the Chinese New Year while Polish Independence Day will see the city hall turned red and white.
McLaren's Jenson Button starts on the second row, ahead of Red Bull's Mark Webber with Ferrari's Fernando Alonso.
BBC: Sebastian Vettel beats Lewis Hamilton to Abu Dhabi pole
Red Bull's Mark Webber emerged as the track dried later on to go third ahead of Mercedes's Michael Schumacher.
BBC: Lewis Hamilton fastest in Friday Australian GP practice
Red 5 Studios CEO Mark Kern had much to say at the Firefall presentation at PAX East 2013.
Romain Grosjean claimed seventh, finishing ahead of Ferrari's Felipe Massa, Toro Rosso's Daniel Ricciardo and Red Bull's Mark Webber.
Red Bull's Mark Webber won the race with BMW's Robert Kubica finishing second.
Red Bull's Mark Webber was asked after the sessions if he thought McLaren were as competitive as their practice performances suggested.
"I'd like to thank Spyker for this opportunity, " said Klien, who lost his Red Bull seat to Mark Webber in 2007.
BBC: SPORT | Motorsport | Formula One | Spyker hand Klien testing drive
"If you race people hard then you run out of tires, " said Red Bull's Mark Webber after last month's Bahrain Grand Prix.
Renault's Fernando Alonso claimed sixth spot ahead of Red Bull's Mark Webber.
Just 0.087 seconds separated the top four as the Pole headed McLaren's Lewis Hamilton, Ferrari's Fernando Alonso and Red Bull's Mark Webber.
Red Bull's Mark Webber recorded the fastest time -- 1m21.953 -- followed nearly two seconds back by Hamilton's team-mate, Heikki Kovalainen.
McLaren's Lewis Hamilton and Jenson Button were fourth and fifth and Red Bull's Mark Webber sixth, heightening hopes for a close, competitive race.
But Red Bull's Mark Webber, the president of the Grand Prix Drivers' Association, pointed out that it had also rained earlier in the day.
On the track, German Rosberg was half a second clear of Red Bull's Mark Webber in practice, while reigning world champion Sebastian Vettel came fourth.
Bourdais was overshadowed for much of last season by former team-mate Sebastian Vettel, who has been promoted to the main Red Bull team alongside Mark Webber for 2009.
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