What caused the Raw set to fall on Mr. McMahon?

For weeks, the WWE Chairman turned his longest running cable program into Money Night Raw with McMahon's Million Dollar Mania. As viewers got their wallets fattened with the Chairman's own cash, Mr. McMahon actually brought himself closer to the loyal WWE Universe members. However, the Chairman's financial frolicking came to a grim close on June 23, 2008. Amid the monetary merriment, sparks began to fly and a sudden accident struck WWE's figurehead. The Raw set collapsed on Mr. McMahon, nearly crippling him and requiring a recovery period that ultimately led to the demise of his do-gooding.