How do you react when you bump into your ex(es)

Saw my ex today for the 1st time after he dumped me over a year. I was not intending to run into him. He gave me a '' cross eye '' at first. I looked away when I first saw him & ignored his presence throughout the trip,even though we traveled on the same plane for 30+ mins.

Now there is nooo way I want that guy in my life but I don't really run into exes did I handled this well ?

What do you do?

Especially if e/ she was the one that dumped you?

How do you react when you bump into your ex(es)
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