We know what you're thinking: Who in their right mind would have a problem with Neil Patrick Harris? But apparently the answer is: plenty of people. However painful it might be, let's take a look at some celebs who seemingly can't abide this apparently not-that-beloved actor.

As detailed in Harris' autobiography, the young actor once got into something of a street fight with Hawaii Five-O star Scott Caan. In the early 90s, Harris was on a date with Eden Sassoon, daughter of hairstylist and businessman Vidal Sassoon. The next thing he knew, he was face-to-face with Caan, who was ready to treat Harris to a good old-fashioned beatdown. Caan was apparently upset because he'd formerly been romantically attached with Sassoon. In fact, Harris claimed that Caan kept furiously bumping chests with him and then threatened him by barking,

"What's up with the West Side, yo?"

According to Harris, Caan reckoned that he was in some sort of "gang" at the time. The two actors then left the club and took their issues outside. It looked like things really were about to come to blows, as Harris admitted to being "terrified and confused" by the whole surreal situation. Fortunately for fans of Harris' face, Caan apparently only got in approximately half a swing before ultimately being stopped by his companions.

Watch the video to see The Real Reason Why Celebs Can't Stand Neil Patrick Harris!

#NeilPatrickHarris #NPH #KevinSmith

​​Scott Caan | 0:17

​James Woods | 1:13

Rachel Bloom | 2:14

​Kevin Smith | 3:35

​Patti LuPone | 4:42