Barbarian Magic
We survive the ambush, even though, or because, the party was split. Searching the bodies, one of the leaders looks like he has some pretty shiny equipment, certainly better than what the scouts were wearing. A chain shirt, a nice-looking weapon, a cloak that's apparently worth mentioning, all which prompts the call of 'detect magic!'
'Yep, they are magical, as are...'
'Hold on, did our dwarf barbarian just cast 'detect magic'?'
'Uh, it was a more of a suggestion?'