Farting all day long

Yesterday, doesn't know what is the reason...i was farting since morning. This time, it was kinda different.

Type 1
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buuuuuuuuuuuuuup...........long one
Type 2
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bluuuueeeekkkkkkkkk.....bup....sharp one
Type 3
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bu bu bu bu bu bu bu bu bu bu bu.....this one sounded like a helicopter.

However it stopped after i go off from my office...wondering why...