The illustration by Perez in Comics Buyer's Guide #1414 (as mentioned by Tony Lorenz) sounds like the one that appeared in Peter David's "But I Digress..." column in CBG #1042, depicting J.J. Sachs looking on as the Hulk punches Spawn through a cement wall.

That drawing also appeared in Wizard #30, accompanying Todd McFarlane's "E.G.O." column. In the column, McFarlane (the creator of Spawn) responds to the illustration by comparing the sales figures for Spawn #17 (at #1) and those for Sachs and Violens #2 (at #179).

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