If you go down to the woods today... and you're altitude training in West Shore Lake Tahoe, California, you're definitely sure of a big surprise.
Trentin was out training when a bear crossed his path on a descent.
"No space to brake so I got in an accident with him," Trentin posted on Instagram.
"He wasn't a fluffy teddybear!"
Bears are a major feature of the region, so much so riders at the women's Amgen Tour of California raced nearby a few weeks ago expected to see some.
One almost obliged, rocking up to a stage start although it was a little late.
Glad to hear Trentin is OK and his lid also did its job.
It could not be confirmed if the bear was on his way to a picnic with his mates.