Just yesterday I was practicing at the school near my house, and they have this huge base ball batter area fence thing with a bar across the top of it. I always like to do stuff on it. But when I got there there was a TON of people on the field, like around 300 people just sitting on the lawn having a pic-nic or something. So I just decided to do it anyway. SO I climbed all the way to the top of it (around 40 feet high) using just my arms and when I looked back every single person was looking at me, so I did one of the upside down hanging things in the very middle of it, and then climbed back down. When my feet touched the ground everbody started clapping. It was kind of inspiring...
Heck, I'm a relatively skilled traceur and wish I could do that... I wouldn't have clapped. I would've bowed to the king! (Sorry, are puns frowned upon? =P)
But I faced this same problem for the longest time, until somebody took a video of me performing a wall-up at the mall. That was the day I realized, I'm a traceur and look doing doing what I love (parkour, in case I wasn't clear. =D). Looks can't stop me from exploiting gravity.
But I must bring up something I have noticed- It's always the old people and moms of young children giving me dirty looks. Probably because the old people are A- always grumpy, or B- wishing they could do that. The mom's of young children's dirty looks, I don't even care about them because their children look at me like I'm some kind of superhero, and that's a great feeling man, a GREAT feeling...
P.S.- If anybody asks you to do a flip, you can either do it or if you are like me and can't do a flip (yet.
) then just say, "Why don't YOU do a flip?" and then use parkour techniques to do whatever it was you meant to do beforehand, and look cool doing so. XD