If you have the time he will become more tractable, sometimes you just get bit. You will live if it happens. It will take some time and he will calm down. Quite unusual, I NEVER handle my dumeril's and the stay tractable. There may be something else unsetting him like improper temps or hunger or other environmental factors.
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Roberts Realm Of Reptile Research
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Thanks,

Frank Roberts

I opened my mouth and out flowed a melody black.