Urban decoder

Sports

What happens to overly frisky fans who run onto sports fields?—Philip Silverman, Palmerston

While walking along the beach recently, I saw some young surfers out on the lake being pulled along by giant kites. Please explain. —Jerry Moffat, Leslieville

An elderly friend mentioned that he remembers watching Olympic-style ski jumping at a facility in the Don Valley. What’s the story? —Louise Clayton, York Mills

How much does it cost the owners of the Rogers Centre (née SkyDome) to open and close the roof? I assume it must take a lot of juice.—Rupert Singh, East York

How do they choose what music to play, and when, during Maple Leafs games?—Murray Kibler