Wow, he did not expect quite that reaction from Alex. Sans can't help a chuckle. He catches it when Alex tosses it back.

"yikes. did i startle you?"

Ah, so throwing flowers at people can be interpreted as...what, flirting? He kinda wishes Alphys had told him that, but maybe she didn't know either.

"oh, trust me, it's just an anime thing. if i was flirting it'd be way more embarrassingly obvious for everyone."