This is Hatton knocking out Maussa with his Floyd Patterson style 'Gazelle punch'.
[youtube=425,350]s45OXd9yaw4[/youtube]

Here's the original, Patterson's 'Gazelle Punch'. The particular punch in question is about 30-32 seconds in.

[youtube=425,350]yd24SWQgj9E[/youtube]

Another comparison I have found is the knockdown of Collazo in the first round.

[youtube=425,350]dBiaRMQCsrs[/youtube]

It looks just like Tyson's fourth round knockdown of James 'Quick' Tillis.

[youtube=425,350]Jl6TiOvDf00[/youtube]

Anyone else got anymore of these. I'm sure there's some pernell Whitaker /Floyd Mayweather ones out there.