Mel Gibson -- It's NOT a Purse!

7/27/2010 8:00 PM PDT
With a baseball cap slung low on his head, Mel Gibson was spotted in Santa Monica yesterday ... carrying a man purse satchel.

It's the second time Mel's been spotted out in two days ... following an entire month in seclusion.

Other celebrity satchel wearers include Indiana Jones, Joy Behar ...