Bam Margera's mom says dehydration, not OD, sent him to ER

Bam Margera's mother April says her son was "severely dehydrated" and that's why the West Chester area "Jackass," was rushed to a local hospital yesterday. TMZ reported that a 911 call mentioned a "possible overdose." April was interviewed this morning on 93.3 WMMR's PrestonSteve show on which the Margera family have been regular guests for years. April told P&S that Bam, who was shooting scenes for MTV's "Nitro Circus," doesn't take care of himself while working.  Bam's publicist has not returned our request for comment, but a friend says he's doing better.