If you can't let it out, use N2O. ;D
It'll help you laugh as well as let it out everything. xD
(http://rs1img.memecdn.com/n2o-laughing-gas_o_843571.jpg)
(http://www.quickmeme.com/img/5a/5acc5c44693bfb9a5b15b285f8b41f82648de4ac65c7d75c410612f0f04aff30.jpg)