Why my colleague told me I laugh with the manager who yelled at him ? He mean I laugh with him or with the manager or with the event?

The manager yelled at him in front of me and after 5 minutes i laughed for other reason i thinked something funny. This time my colleague told me i laugh with the manager who yelled at him.
Why my colleague told me I laugh with the manager who yelled at him ? He mean I laugh with him or with the manager or with the event?
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