York Regional Police are out with a warning about what seems to be a concerning new trend.
They've responded to four separate cases of young people climbing construction cranes in the last three weeks.
Police aren't sure of the motive but they're warning of the obvious dangers of climbing a 13-storey crane.
They say it also puts the first responders at risk and ties up resources.
Charges in the four incidents range from trespassing, a ticket, to the criminal charge of mischief.